Untrack SECURITY_REVIEW_TODO.md and gitignore it

Keep the findings tracker local-only; it should not be published.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.github/workflows/build.yml

@@ -0,0 +1,133 @@
+name: Build and publish image
+
+# Publishes the multi-arch image (amd64 + arm64) to GitHub Packages
+# (ghcr.io/dkam/clinch) whenever config/initializers/version.rb changes on
+# main — a version bump IS the release. Each arch builds natively (no QEMU); a
+# merge job stitches them into one manifest tagged :vX.Y.Z (+ :latest for
+# non-pre-releases).
+#
+# To cut a release: edit Clinch::VERSION in config/initializers/version.rb,
+# commit, push. For a dev build: set a pre-release version (e.g. "1.1.0-dev") —
+# it publishes :v1.1.0-dev but does not move :latest. Or run this workflow
+# manually from the Actions tab.
+
+on:
+  push:
+    branches: [ main ]
+    paths:
+      - config/initializers/version.rb
+  workflow_dispatch:
+
+env:
+  IMAGE: ghcr.io/${{ github.repository }}
+
+jobs:
+  # Read the SemVer constant; decide whether this release moves :latest.
+  prepare:
+    runs-on: ubuntu-latest
+    outputs:
+      version: ${{ steps.version.outputs.version }}
+      latest: ${{ steps.version.outputs.latest }}
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Read version from config/initializers/version.rb
+        id: version
+        run: |
+          V=$(ruby -e "require './config/initializers/version'; puts Clinch::VERSION")
+          echo "version=$V" >> "$GITHUB_OUTPUT"
+          # A pre-release (e.g. 1.1.0-dev) publishes its own tag but not :latest.
+          if [[ "$V" == *-* ]]; then latest=false; else latest=true; fi
+          echo "latest=$latest" >> "$GITHUB_OUTPUT"
+          echo "Building v$V (move :latest = $latest)"
+
+  build:
+    needs: prepare
+    runs-on: ${{ matrix.runner }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+          - platform: linux/amd64
+            arch: amd64
+            runner: ubuntu-latest
+          - platform: linux/arm64
+            arch: arm64
+            runner: ubuntu-24.04-arm
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v5
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Build and push by digest
+        id: build
+        uses: docker/build-push-action@v6
+        with:
+          context: .
+          platforms: ${{ matrix.platform }}
+          cache-from: type=gha,scope=${{ matrix.arch }}
+          cache-to: type=gha,mode=max,scope=${{ matrix.arch }}
+          outputs: type=image,name=${{ env.IMAGE }},push-by-digest=true,name-canonical=true,push=true
+
+      - name: Export digest
+        run: |
+          mkdir -p /tmp/digests
+          digest="${{ steps.build.outputs.digest }}"
+          touch "/tmp/digests/${digest#sha256:}"
+
+      - name: Upload digest
+        uses: actions/upload-artifact@v4
+        with:
+          name: digests-${{ matrix.arch }}
+          path: /tmp/digests/*
+          if-no-files-found: error
+          retention-days: 1
+
+  merge:
+    needs: [prepare, build]
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+    steps:
+      - name: Download digests
+        uses: actions/download-artifact@v4
+        with:
+          path: /tmp/digests
+          pattern: digests-*
+          merge-multiple: true
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Log in to GitHub Container Registry
+        uses: docker/login-action@v3
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Create and push the multi-arch manifest
+        working-directory: /tmp/digests
+        run: |
+          tags="-t ${{ env.IMAGE }}:v${{ needs.prepare.outputs.version }}"
+          if [ "${{ needs.prepare.outputs.latest }}" = "true" ]; then
+            tags="$tags -t ${{ env.IMAGE }}:latest"
+          fi
+          docker buildx imagetools create $tags $(printf '${{ env.IMAGE }}@sha256:%s ' *)
+
+      - name: Inspect result
+        run: docker buildx imagetools inspect ${{ env.IMAGE }}:latest

.gitignore

@@ -70,3 +70,6 @@ yarn-debug.log*
 
 # Ignore bootsnap cache
 /tmp/cache/bootsnap*
+
+# Local-only: do not publish the security findings tracker
+SECURITY_REVIEW_TODO.md

.ruby-version

@@ -1 +1 @@
-4.0.3
+4.0.5

Dockerfile

@@ -8,7 +8,7 @@
 # For a containerized dev environment, see Dev Containers: https://guides.rubyonrails.org/getting_started_with_devcontainer.html
 
 # Make sure RUBY_VERSION matches the Ruby version in .ruby-version
-ARG RUBY_VERSION=4.0.3
+ARG RUBY_VERSION=4.0.5
 FROM docker.io/library/ruby:$RUBY_VERSION-slim AS base
 
 LABEL org.opencontainers.image.source=https://github.com/dkam/clinch

Gemfile.lock

@@ -1,7 +1,7 @@
 GEM
   remote: https://rubygems.org/
   specs:
-    action_text-trix (2.1.18)
+    action_text-trix (2.1.19)
       railties
     actioncable (8.1.3)
       actionpack (= 8.1.3)
@@ -85,9 +85,9 @@ GEM
     bigdecimal (4.1.2)
     bindata (2.5.1)
     bindex (0.8.1)
-    bootsnap (1.24.1)
+    bootsnap (1.24.6)
       msgpack (~> 1.2)
-    brakeman (8.0.4)
+    brakeman (8.0.5)
       racc
     builder (3.3.0)
     bundler-audit (0.9.3)
@@ -102,11 +102,11 @@ GEM
       rack-test (>= 0.6.3)
       regexp_parser (>= 1.5, < 3.0)
       xpath (~> 3.2)
-    cbor (0.5.10.2)
+    cbor (0.5.10.3)
     childprocess (5.1.0)
       logger (~> 1.5)
     chunky_png (1.4.0)
-    concurrent-ruby (1.3.6)
+    concurrent-ruby (1.3.7)
     connection_pool (3.0.2)
     cose (1.3.1)
       cbor (~> 0.5.9)
@@ -131,12 +131,12 @@ GEM
     ffi (1.17.4-arm64-darwin)
     ffi (1.17.4-x86_64-linux-gnu)
     ffi (1.17.4-x86_64-linux-musl)
-    fugit (1.12.1)
+    fugit (1.12.2)
       et-orbi (~> 1.4)
       raabro (~> 1.4)
     globalid (1.3.0)
       activesupport (>= 6.1)
-    i18n (1.14.8)
+    i18n (1.15.2)
       concurrent-ruby (~> 1.0)
     image_processing (1.14.0)
       mini_magick (>= 4.9.5, < 6)
@@ -151,13 +151,13 @@ GEM
       prism (>= 1.3.0)
       rdoc (>= 4.0.0)
       reline (>= 0.4.2)
-    jbuilder (2.14.1)
+    jbuilder (2.15.1)
       actionview (>= 7.0.0)
       activesupport (>= 7.0.0)
-    json (2.19.4)
+    json (2.19.9)
-    jwt (3.1.2)
+    jwt (3.2.0)
       base64
-    kamal (2.11.0)
+    kamal (2.12.0)
       activesupport (>= 7.0)
       base64 (~> 0.2)
       bcrypt_pbkdf (~> 1.0)
@@ -186,14 +186,14 @@ GEM
       net-imap
       net-pop
       net-smtp
-    marcel (1.1.0)
+    marcel (1.2.1)
     matrix (0.4.3)
     mini_magick (5.3.1)
       logger
     mini_mime (1.1.5)
     minitest (5.27.0)
-    msgpack (1.8.0)
+    msgpack (1.8.3)
-    net-imap (0.6.4)
+    net-imap (0.6.4.1)
       date
       net-protocol
     net-pop (0.1.2)
@@ -208,25 +208,25 @@ GEM
       net-protocol
     net-ssh (7.3.2)
     nio4r (2.7.5)
-    nokogiri (1.19.3-aarch64-linux-gnu)
+    nokogiri (1.19.4-aarch64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.19.3-aarch64-linux-musl)
+    nokogiri (1.19.4-aarch64-linux-musl)
       racc (~> 1.4)
-    nokogiri (1.19.3-arm-linux-gnu)
+    nokogiri (1.19.4-arm-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.19.3-arm-linux-musl)
+    nokogiri (1.19.4-arm-linux-musl)
       racc (~> 1.4)
-    nokogiri (1.19.3-arm64-darwin)
+    nokogiri (1.19.4-arm64-darwin)
       racc (~> 1.4)
-    nokogiri (1.19.3-x86_64-linux-gnu)
+    nokogiri (1.19.4-x86_64-linux-gnu)
       racc (~> 1.4)
-    nokogiri (1.19.3-x86_64-linux-musl)
+    nokogiri (1.19.4-x86_64-linux-musl)
       racc (~> 1.4)
-    openssl (4.0.1)
+    openssl (4.0.2)
     openssl-signature_algorithm (1.3.0)
       openssl (> 2.0)
     ostruct (0.6.3)
-    parallel (1.28.0)
+    parallel (2.1.0)
     parser (3.3.11.1)
       ast (~> 2.4.1)
       racc
@@ -238,11 +238,11 @@ GEM
       actionpack (>= 7.0.0)
       activesupport (>= 7.0.0)
       rack
-    psych (5.3.1)
+    psych (5.4.0)
       date
       stringio
     public_suffix (7.0.5)
-    puma (8.0.1)
+    puma (8.0.2)
       nio4r (~> 2.0)
     raabro (1.4.0)
     racc (1.8.1)
@@ -299,11 +299,11 @@ GEM
       chunky_png (~> 1.0)
       rqrcode_core (~> 2.0)
     rqrcode_core (2.1.0)
-    rubocop (1.84.2)
+    rubocop (1.87.0)
       json (~> 2.3)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.1.0)
-      parallel (~> 1.10)
+      parallel (>= 1.10)
       parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
       regexp_parser (>= 2.9.3, < 3.0)
@@ -321,20 +321,20 @@ GEM
     ruby-vips (2.3.0)
       ffi (~> 1.12)
       logger
-    rubyzip (3.2.2)
+    rubyzip (3.4.0)
     safety_net_attestation (0.5.0)
       jwt (>= 2.0, < 4.0)
     securerandom (0.4.1)
-    selenium-webdriver (4.43.0)
+    selenium-webdriver (4.45.0)
       base64 (~> 0.2)
       logger (~> 1.4)
       rexml (~> 3.2, >= 3.2.5)
       rubyzip (>= 1.2.2, < 4.0)
       websocket (~> 1.0)
-    sentry-rails (6.5.0)
+    sentry-rails (6.6.2)
       railties (>= 5.2.0)
-      sentry-ruby (~> 6.5.0)
+      sentry-ruby (~> 6.6.2)
-    sentry-ruby (6.5.0)
+    sentry-ruby (6.6.2)
       bigdecimal
       concurrent-ruby (~> 1.0, >= 1.0.2)
       logger
@@ -344,7 +344,7 @@ GEM
       simplecov_json_formatter (~> 0.1)
     simplecov-html (0.13.2)
     simplecov_json_formatter (0.1.4)
-    solid_cable (3.0.12)
+    solid_cable (4.0.0)
       actioncable (>= 7.2)
       activejob (>= 7.2)
       activerecord (>= 7.2)
@@ -360,13 +360,13 @@ GEM
       fugit (~> 1.11)
       railties (>= 7.1)
       thor (>= 1.3.1)
-    sqlite3 (2.9.3-aarch64-linux-gnu)
+    sqlite3 (2.9.5-aarch64-linux-gnu)
-    sqlite3 (2.9.3-aarch64-linux-musl)
+    sqlite3 (2.9.5-aarch64-linux-musl)
-    sqlite3 (2.9.3-arm-linux-gnu)
+    sqlite3 (2.9.5-arm-linux-gnu)
-    sqlite3 (2.9.3-arm-linux-musl)
+    sqlite3 (2.9.5-arm-linux-musl)
-    sqlite3 (2.9.3-arm64-darwin)
+    sqlite3 (2.9.5-arm64-darwin)
-    sqlite3 (2.9.3-x86_64-linux-gnu)
+    sqlite3 (2.9.5-x86_64-linux-gnu)
-    sqlite3 (2.9.3-x86_64-linux-musl)
+    sqlite3 (2.9.5-x86_64-linux-musl)
     sshkit (1.25.0)
       base64
       logger
@@ -374,10 +374,10 @@ GEM
       net-sftp (>= 2.1.2)
       net-ssh (>= 2.8.0)
       ostruct
-    standard (1.54.0)
+    standard (1.55.0)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.0)
-      rubocop (~> 1.84.0)
+      rubocop (~> 1.87.0)
       standard-custom (~> 1.0.0)
       standard-performance (~> 1.8)
     standard-custom (1.0.2)
@@ -389,20 +389,20 @@ GEM
     stimulus-rails (1.3.4)
       railties (>= 6.0.0)
     stringio (3.2.0)
-    tailwindcss-rails (4.4.0)
+    tailwindcss-rails (4.6.0)
       railties (>= 7.0.0)
       tailwindcss-ruby (~> 4.0)
-    tailwindcss-ruby (4.2.4)
+    tailwindcss-ruby (4.3.1)
-    tailwindcss-ruby (4.2.4-aarch64-linux-gnu)
+    tailwindcss-ruby (4.3.1-aarch64-linux-gnu)
-    tailwindcss-ruby (4.2.4-aarch64-linux-musl)
+    tailwindcss-ruby (4.3.1-aarch64-linux-musl)
-    tailwindcss-ruby (4.2.4-arm64-darwin)
+    tailwindcss-ruby (4.3.1-arm64-darwin)
-    tailwindcss-ruby (4.2.4-x86_64-linux-gnu)
+    tailwindcss-ruby (4.3.1-x86_64-linux-gnu)
-    tailwindcss-ruby (4.2.4-x86_64-linux-musl)
+    tailwindcss-ruby (4.3.1-x86_64-linux-musl)
     thor (1.5.0)
-    thruster (0.1.20)
+    thruster (0.1.21)
-    thruster (0.1.20-aarch64-linux)
+    thruster (0.1.21-aarch64-linux)
-    thruster (0.1.20-arm64-darwin)
+    thruster (0.1.21-arm64-darwin)
-    thruster (0.1.20-x86_64-linux)
+    thruster (0.1.21-x86_64-linux)
     timeout (0.6.1)
     tpm-key_attestation (0.14.1)
       bindata (~> 2.4)
@@ -432,13 +432,13 @@ GEM
       safety_net_attestation (~> 0.5.0)
       tpm-key_attestation (~> 0.14.0)
     websocket (1.2.11)
-    websocket-driver (0.8.0)
+    websocket-driver (0.8.1)
       base64
       websocket-extensions (>= 0.1.0)
     websocket-extensions (0.1.5)
     xpath (3.2.0)
       nokogiri (~> 1.8)
-    zeitwerk (2.7.5)
+    zeitwerk (2.8.2)
 
 PLATFORMS
   aarch64-linux

SECURITY_REVIEW_TODO.md

@@ -1,110 +0,0 @@
-# Security Review — Tracking
-
-Status of findings from the multi-surface security review (OIDC/OAuth2, ForwardAuth,
-WebAuthn/TOTP, sessions, admin/config). Work landed on branch
-`security/forward-auth-and-consent-csrf`.
-
-## ✅ Done (branch `security/forward-auth-and-consent-csrf`)
-
-All HIGH findings are closed. Each fix has tests; suite is green.
-
-| Commit | Fix | Sev |
-|--------|-----|-----|
-| `703d24e` | ForwardAuth fail-open when no host header; consent endpoint CSRF | HIGH ×2 |
-| `8a095e4` | Bearer API-key skipped group check at use-time | HIGH |
-| `96a657e` | Open redirect via unvalidated `X-Forwarded-Host` in login redirect | HIGH |
-| `84ed462` | `CLINCH_HOST` made mandatory in deployed envs; dropped request-host fallback | MEDIUM |
-| `f38ac2e` | TOTP code replay within drift window (+ latent plaintext backup-code bug) | HIGH |
-| `406a79d` | SSRF via `backchannel_logout_uri` (metadata/loopback/RFC1918) | HIGH |
-| `57d7d1f` | Host-auth regex unanchored (`evil-example.com` matched) | HIGH |
-| `89bd5f1` | Disabled user could complete 2FA mid-flow / keep session; enforce active status | HIGH |
-| `cd862c7` | TOTP/backup/OAuth/PKCE `code` params not filtered from logs | MEDIUM |
-| `2426687` | `revoke_family!` didn't revoke access tokens on refresh-token reuse | HIGH |
-| `44892e3` | WebAuthn clone detection logged but didn't block; false-positive on synced passkeys | HIGH |
-| `d49e7ce` | CSP `unsafe-inline` removed (script-src + style-src → nonces) | HIGH |
-
-**Verified false positive (no change):** PKCE *is* required by default —
-`require_pkce` column defaults to `true` (`db/schema.rb`), token endpoint enforces
-it, admin UI exposes the opt-out. Operational check: confirm no legacy confidential
-apps sit on `require_pkce = false`.
-
-**Follow-up before relying on CSP change:** do one manual browser pass (DevTools
-console) on `/signin`, OAuth consent, a Turbo navigation, dark-mode toggle, and a
-WebAuthn sign-in — expect zero CSP violations. Dev is report-only so violations
-surface as warnings without breaking. Fallback if style-src surprises: keep
-`style-src 'unsafe-inline'`, ship script-src only.
-
-## ☐ Remaining — MEDIUM
-
-- [ ] **`id_token_hint` ignored at OIDC logout** — any client can redirect logout to
-      any other registered client's post-logout URI. Validate the hint's `aud` and
-      scope the redirect to that app. `app/controllers/oidc_controller.rb` (logout).
-- [ ] **`offline_access` doesn't gate refresh-token issuance** — refresh tokens are
-      minted unconditionally; gate on the granted scope.
-      `app/controllers/oidc_controller.rb` (authorization_code grant, ~line 564).
-- [ ] **CSP-report endpoint hardening** — unauthenticated, no rate limit / body-size
-      cap, logs raw CRLF (log injection). Sanitize values, cap size, rate-limit.
-      `app/controllers/api/csp_controller.rb`.
-- [ ] **Port not stripped from `X-Forwarded-Host`** in main verify + bearer paths →
-      403 outages on non-standard ports (also a correctness bug). Reuse the
-      port-stripping done in `check_forward_auth_token`.
-      `app/controllers/api/forward_auth_controller.rb`.
-- [ ] **WebAuthn `acr:"2"` without enforced user verification** — `user_verification:
-      "preferred"` lets a PIN-less key authenticate yet reports verified 2FA. Use
-      `"required"`, or downgrade `acr` to `"1"` when the UV flag is absent.
-      `app/controllers/sessions_controller.rb` (webauthn_challenge/verify),
-      `app/controllers/webauthn_controller.rb`.
-- [ ] **`RESERVED_CLAIMS` incomplete** — missing `at_hash`/`auth_time`/`acr`; and
-      `ApplicationUserClaims` has no reserved-name validation (User/Group do). Could
-      let a custom claim overwrite a security claim. `app/services/oidc_jwt_service.rb`,
-      `app/models/application_user_claim.rb`.
-- [ ] **`reset_session` not called on login** — defensive best practice for an IdP;
-      clears pre-auth session state. `app/controllers/concerns/authentication.rb`
-      (`start_new_session_for`).
-- [x] **Hardcoded private IP `192.168.2.246`** in `config/environments/production.rb`
-      — removed; it was redundant with the `192.168.0.0/16` regex already in the
-      `CLINCH_ALLOW_INTERNAL_IPS` block.
-- [ ] **CSP `form-action` widened by unvalidated `redirect_uri`** before auth — only
-      add to `form-action` if the client_id+redirect_uri is a registered pair.
-      `app/controllers/concerns/authentication.rb` (`allow_oauth_redirect_in_csp`).
-- [ ] **SVG `style` attribute permits `url()`/`expression()`** — mitigated today by
-      `Content-Disposition: attachment`, but fragile. Sanitize CSS values or drop
-      `style` from the allowlist. `app/models/svg_scrubber.rb`.
-- [ ] **WebAuthn error messages leak internals** — return generic errors to client,
-      log detail server-side. `app/controllers/sessions_controller.rb`,
-      `app/controllers/webauthn_controller.rb`.
-- [ ] **Account enumeration via webauthn challenge** — distinguishes "user not found"
-      vs "no passkey". Return a uniform message. `app/controllers/sessions_controller.rb`
-      (`webauthn_challenge`).
-- [ ] **`token_family_id` only 31 bits** (`SecureRandom.random_number(2**31)`) —
-      birthday collision ~46k; use a UUID/string. `app/models/oidc_refresh_token.rb`.
-- [ ] **Session cookie uses sequential integer DB id** — HMAC-signed so not forgeable,
-      but consider a random `token` column (Rails 8 generator default).
-      `app/models/session.rb`, `app/controllers/concerns/authentication.rb`.
-- [ ] **Login rate-limit is IP-only** — no account lockout (distributed brute force /
-      credential stuffing). Add failed-count + `locked_until` on users.
-- [ ] **Backup-code rate limit not reset on success** and is cache-based (resets on
-      cache flush). Reset on success; consider DB-backed counter. `app/models/user.rb`.
-
-## ☐ Remaining — LOW / INFO
-
-- [ ] Public clients can't revoke their own tokens (revoke endpoint requires secret).
-- [ ] Basic-auth client creds not URL-decoded per RFC 6749 §2.3.1.
-- [ ] `token_hmac` columns nullable at DB level despite model `presence: true`.
-- [ ] Group names allow commas → injection into `X-Remote-Groups` (false memberships
-      downstream). Add a format validator. `app/models/group.rb`.
-- [ ] `fa_token` leaks in redirect URL / Referer / history (60s TTL, host-bound).
-- [ ] Admin `domain_pattern` allows ReDoS — add a format validator.
-      `app/models/application.rb`.
-- [ ] Forced-TOTP-setup login path can redirect-loop (`totp_required` + no TOTP).
-- [ ] `complete_setup` creates an unprompted session for any authenticated user.
-- [ ] Password min length only 8 — consider 12 + a max (bcrypt 72-byte truncation).
-- [ ] `support_unencrypted_data: true` left enabled (TOTP secret encryption migration).
-      `config/initializers/active_record_encryption.rb`.
-- [ ] All crypto keys derived from a single `SECRET_KEY_BASE` root — document setting
-      independent `ACTIVE_RECORD_ENCRYPTION_*` keys in production.
-- [ ] Log injection via user `email_address` in ForwardAuth logs (strip CRLF / use
-      structured logging). `app/controllers/api/forward_auth_controller.rb`.
-- [ ] WebAuthn RP ID is the registrable domain (cross-subdomain credential roaming) —
-      set `CLINCH_RP_ID` to the exact host unless roaming is intended.
-      `config/initializers/webauthn.rb`.

app/controllers/admin/access_checks_controller.rb

@@ -2,17 +2,12 @@ module Admin
   class AccessChecksController < BaseController
     def new
       load_options
-    end
-
-    def create
-      load_options
       @user = User.find_by(id: params[:user_id])
       @application = Application.find_by(id: params[:application_id])
-      return render :new unless @user && @application
+      return unless @user && @application
 
       @allowed = @application.user_allowed?(@user)
       @via = @user.groups & @application.allowed_groups
-      render :new
     end
 
     private

app/controllers/api/forward_auth_controller.rb

@@ -156,7 +156,7 @@ module Api
     end
 
     def render_bearer_error(message)
-      render json: { error: message }, status: :unauthorized
+      render json: {error: message}, status: :unauthorized
     end
 
     def check_forward_auth_token
@@ -207,7 +207,7 @@ module Api
 
       session[:return_to_after_authenticating] = original_url
 
-      login_params = { rd: original_url, rm: request.method }
+      login_params = {rd: original_url, rm: request.method}
       login_url = "#{base_url}/signin?#{login_params.to_query}"
 
       redirect_to login_url, allow_other_host: true, status: :found

app/controllers/concerns/authentication.rb

@@ -191,7 +191,7 @@ module Authentication
     token = SecureRandom.urlsafe_base64(32)
     Rails.cache.write(
       "forward_auth_token:#{token}",
-      { session_id: session_obj.id, host: bound_host },
+      {session_id: session_obj.id, host: bound_host},
       expires_in: 60.seconds
     )
 

app/helpers/application_helper.rb

@@ -31,7 +31,7 @@ module ApplicationHelper
     end
     lines << "OIDC_DISCOVERY_URL=#{OidcJwtService.issuer_url}"
     lines << "OIDC_PROVIDER_NAME='Clinch'"
-    lines << "OIDC_REQUIRE_PKCE=#{application.requires_pkce? ? 'true' : 'false'}"
+    lines << "OIDC_REQUIRE_PKCE=#{application.requires_pkce? ? "true" : "false"}"
     lines
   end
 

app/lib/private_address_check.rb

@@ -35,7 +35,7 @@ module PrivateAddressCheck
     return [ip] if ip
 
     Resolv.getaddresses(host.to_s).filter_map { |a| parse_ip(a) }
-  rescue StandardError
+  rescue
     # Resolution failure: surface no addresses. Callers treat "can't resolve" as
     # not-provably-internal; the dial itself will then fail safely.
     []

app/mailers/totp_mailer.rb

@@ -2,6 +2,6 @@ class TotpMailer < ApplicationMailer
   def enabled(user)
     @user = user
     mail subject: "Two-factor authentication enabled on your account",
-         to: user.email_address
+      to: user.email_address
   end
 end

app/views/admin/access_checks/new.html.erb

@@ -5,7 +5,7 @@
 
 <div class="bg-white dark:bg-gray-800 shadow sm:rounded-lg">
   <div class="px-4 py-5 sm:p-6">
-    <%= form_with url: admin_access_path, method: :post, class: "space-y-4" do |form| %>
+    <%= form_with url: admin_access_path, method: :get, class: "space-y-4" do |form| %>
       <div class="grid grid-cols-1 gap-4 sm:grid-cols-2">
         <div>
           <%= form.label :user_id, "User", class: "block text-sm font-medium text-gray-700 dark:text-gray-300" %>

config/environments/production.rb

@@ -157,17 +157,5 @@ Rails.application.configure do
   # Skip DNS rebinding protection for the default health check endpoint.
   config.host_authorization = {exclude: ->(request) { request.path == "/up" }}
 
-  # Sentry configuration for production
+  # Sentry is configured in config/initializers/sentry.rb, gated on SENTRY_DSN.
-  # Only enabled if SENTRY_DSN environment variable is set
-  if ENV["SENTRY_DSN"].present?
-    config.sentry.enabled = true
-
-    # Performance monitoring: sample 20% of transactions for traces
-    # Adjust based on your traffic volume and Sentry plan limits
-    config.sentry.traces_sample_rate = ENV.fetch("SENTRY_TRACES_SAMPLE_RATE", 0.2).to_f
-
-    # Continuous profiling: disabled by default in production due to cost
-    # Enable temporarily for performance investigations if needed
-    config.sentry.profiles_sample_rate = ENV.fetch("SENTRY_PROFILES_SAMPLE_RATE", 0.0).to_f
-  end
 end

config/initializers/content_security_policy.rb

@@ -53,9 +53,10 @@ Rails.application.configure do
     # Child sources: Allow self for any future iframes
     policy.child_src :self
 
-    # Additional security headers for WebAuthn
+    # Do not enforce Trusted Types. The only valid value for
-    # Required for WebAuthn to work properly
+    # require-trusted-types-for is 'script'; there is no 'none' token, so
-    policy.require_trusted_types_for :none
+    # emitting it produces an invalid directive that browsers reject. To leave
+    # Trusted Types unenforced (needed for WebAuthn), omit the directive entirely.
 
     # CSP reporting using report_uri (supported method)
     policy.report_uri "/api/csp-violation-report"

config/initializers/sentry.rb

@@ -1,62 +1,44 @@
-# Sentry configuration for error tracking and performance monitoring
+# Sentry configuration for error tracking and performance monitoring.
-# Only initializes if SENTRY_DSN environment variable is set
+# Only initializes if the SENTRY_DSN environment variable is set.
 
 return unless ENV["SENTRY_DSN"].present?
 
-Rails.application.configure do
+Sentry.init do |config|
-  config.sentry.dsn = ENV["SENTRY_DSN"]
+  config.dsn = ENV["SENTRY_DSN"]
 
-  # Set environment (defaults to Rails.env)
+  # Environment label (defaults to Rails.env)
-  config.sentry.environment = ENV["SENTRY_ENVIRONMENT"] || Rails.env
+  config.environment = ENV["SENTRY_ENVIRONMENT"] || Rails.env
 
-  # Set release version from Git or environment variable
+  # Release version from an env var or the current Git SHA
-  config.sentry.release = ENV["SENTRY_RELEASE"] || `git rev-parse HEAD 2>/dev/null`.strip.presence || nil
+  config.release = ENV["SENTRY_RELEASE"] || `git rev-parse HEAD 2>/dev/null`.strip.presence
 
-  # Sample rate for performance monitoring (0.0 to 1.0)
+  # Only report from production unless explicitly enabled elsewhere.
-  config.sentry.traces_sample_rate = ENV.fetch("SENTRY_TRACES_SAMPLE_RATE", 0.1).to_f
+  config.enabled_environments =
-
+    if ENV["SENTRY_ENABLED_IN_DEVELOPMENT"] == "true"
-  # Enable profiling in development/staging, disable in production unless explicitly enabled
+      %w[production development]
-  config.sentry.profiles_sample_rate = if Rails.env.production?
+    else
-    ENV.fetch("SENTRY_PROFILES_SAMPLE_RATE", 0.0).to_f
+      %w[production]
-  else
-    ENV.fetch("SENTRY_PROFILES_SAMPLE_RATE", 0.5).to_f
-  end
-
-  # Include additional context
-  config.sentry.before_send = lambda do |event, hint|
-    # Filter out sensitive information
-    if event.context[:extra]
-      event.context[:extra].reject! { |key, value|
-        key.to_s.match?(/password|secret|token|key/i) || value.to_s.match?(/password|secret/i)
-      }
     end
 
-    # Filter sensitive parameters
+  # Don't send cookies, request bodies, or user IPs by default.
-    if event.context[:request]
+  config.send_default_pii = false
-      event.context[:request].reject! { |key, value|
+
-        key.to_s.match?(/password|secret|token|key|authorization/i)
+  # Breadcrumbs for debugging
-      }
+  config.breadcrumbs_logger = [:active_support_logger, :http_logger]
+
+  # Performance monitoring sample rate (0.0 to 1.0)
+  config.traces_sample_rate = ENV.fetch("SENTRY_TRACES_SAMPLE_RATE", 0.1).to_f
+
+  # Profiling: disabled in production by default due to cost.
+  config.profiles_sample_rate =
+    if Rails.env.production?
+      ENV.fetch("SENTRY_PROFILES_SAMPLE_RATE", 0.0).to_f
+    else
+      ENV.fetch("SENTRY_PROFILES_SAMPLE_RATE", 0.5).to_f
     end
 
-    event
-  end
-
-  # Include breadcrumbs for debugging
-  config.sentry.breadcrumbs_logger = [:active_support_logger, :http_logger]
-
-  # Send session data for user context
-  config.sentry.user_context = lambda do
-    if Current.user.present?
-      {
-        id: Current.user.id,
-        email: Current.user.email_address,
-        admin: Current.user.admin?
-      }
-    end
-  end
-
   # Ignore common non-critical exceptions
-  config.sentry.excluded_exceptions += [
+  config.excluded_exceptions += [
     "ActionController::RoutingError",
     "ActionController::InvalidAuthenticityToken",
     "ActionController::UnknownFormat",
@@ -66,75 +48,38 @@ Rails.application.configure do
     "ActiveRecord::RecordNotFound"
   ]
 
-  # Add CSP-specific tags for security events
+  # Attach application/user context and scrub anything sensitive before sending.
-  config.sentry.tags = lambda do
+  config.before_send = lambda do |event, _hint|
-    {
+    event.tags = (event.tags || {}).merge(
-      # Add application context
       app_name: "clinch",
-      app_environment: Rails.env,
+      app_environment: Rails.env
-      # Add CSP policy status
+    )
-      csp_enabled: defined?(Rails.application.config.content_security_policy) &&
-        Rails.application.config.content_security_policy.present?
-    }
-  end
 
-  # Enhance before_send to handle CSP events properly
+    if defined?(Current) && Current.respond_to?(:user) && Current.user
-  config.sentry.before_send = lambda do |event, hint|
+      event.user = (event.user || {}).merge(
-    # Filter out sensitive information
+        id: Current.user.id,
-    if event.context[:extra]
+        email: Current.user.email_address,
-      event.context[:extra].reject! { |key, value|
+        admin: Current.user.admin?
+      )
+    end
+
+    if event.extra.is_a?(Hash)
+      event.extra.reject! do |key, value|
         key.to_s.match?(/password|secret|token|key/i) || value.to_s.match?(/password|secret/i)
-      }
+      end
-    end
-
-    # Filter sensitive parameters
-    if event.context[:request]
-      event.context[:request].reject! { |key, value|
-        key.to_s.match?(/password|secret|token|key|authorization/i)
-      }
-    end
-
-    # Special handling for CSP violations
-    if event.tags&.dig(:csp_violation)
-      # Ensure CSP violations have proper security context
-      event.context[:server] = event.context[:server] || {}
-      event.context[:server][:name] = "clinch-auth-service"
-      event.context[:server][:environment] = Rails.env
-
-      # Add additional security context
-      event.context[:extra] ||= {}
-      event.context[:extra][:security_context] = {
-        csp_reporting: true,
-        user_authenticated: event.context[:user].present?,
-        request_origin: event.context[:request]&.dig(:headers, "Origin"),
-        request_referer: event.context[:request]&.dig(:headers, "Referer")
-      }
     end
 
     event
   end
 
-  # Add CSP-specific breadcrumbs for security events
+  # Scrub sensitive data out of breadcrumbs.
-  config.sentry.before_breadcrumb = lambda do |breadcrumb, hint|
+  config.before_breadcrumb = lambda do |breadcrumb, _hint|
-    # Filter out sensitive breadcrumb data
+    if breadcrumb.data.is_a?(Hash)
-    if breadcrumb[:data]
+      breadcrumb.data.reject! do |key, value|
-      breadcrumb[:data].reject! { |key, value|
+        key.to_s.match?(/password|secret|token|key|authorization/i) || value.to_s.match?(/password|secret/i)
-        key.to_s.match?(/password|secret|token|key|authorization/i) ||
+      end
-          value.to_s.match?(/password|secret/i)
-      }
-    end
-
-    # Mark CSP-related events
-    if breadcrumb[:message]&.include?("CSP Violation") ||
-        breadcrumb[:category]&.include?("csp")
-      breadcrumb[:data] ||= {}
-      breadcrumb[:data][:security_event] = true
-      breadcrumb[:data][:csp_violation] = true
     end
 
     breadcrumb
   end
-
-  # Only send errors in production unless explicitly enabled
-  config.sentry.enabled = Rails.env.production? || ENV["SENTRY_ENABLED_IN_DEVELOPMENT"] == "true"
 end

config/initializers/version.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
 
 module Clinch
-  VERSION = "0.16.0"
+  VERSION = "0.16.3"
 end

config/routes.rb

@@ -96,7 +96,6 @@ Rails.application.routes.draw do
     end
     resources :groups
     get "access", to: "access_checks#new"
-    post "access", to: "access_checks#create"
   end
 
   # Render dynamic PWA files from app/views/pwa/* (remember to link manifest in application.html.erb)

db/migrate/20260420073319_add_oidc_authorization_code_id_to_tokens.rb

@@ -1,8 +1,8 @@
 class AddOidcAuthorizationCodeIdToTokens < ActiveRecord::Migration[8.1]
   def change
     add_reference :oidc_access_tokens, :oidc_authorization_code,
-                  null: true, foreign_key: true, index: true
+      null: true, foreign_key: true, index: true
     add_reference :oidc_refresh_tokens, :oidc_authorization_code,
-                  null: true, foreign_key: true, index: true
+      null: true, foreign_key: true, index: true
   end
 end

test/controllers/admin/access_checks_controller_test.rb

@@ -15,8 +15,8 @@ module Admin
       assert_match "alice@example.com", response.body
     end
 
-    test "create returns 'can access' with via group when user is in an allowed group" do
+    test "returns 'can access' with via group when user is in an allowed group" do
-      post admin_access_path, params: {
+      get admin_access_path, params: {
         user_id: users(:alice).id,
         application_id: @kavita.id
       }
@@ -25,9 +25,9 @@ module Admin
       assert_match "Administrators", response.body # alice is in admin_group; kavita has admin_group
     end
 
-    test "create returns 'cannot access' with reason when user shares no group with the app" do
+    test "returns 'cannot access' with reason when user shares no group with the app" do
       lonely = User.create!(email_address: "lonely@example.com", password: "password123", skip_auto_assign: true)
-      post admin_access_path, params: {
+      get admin_access_path, params: {
         user_id: lonely.id,
         application_id: @kavita.id
       }
@@ -36,8 +36,8 @@ module Admin
       assert_match "shares no group", response.body
     end
 
-    test "create renders form unchanged when ids are missing" do
+    test "renders form unchanged when ids are missing" do
-      post admin_access_path, params: {user_id: "", application_id: ""}
+      get admin_access_path, params: {user_id: "", application_id: ""}
       assert_response :success
       # No result panel should render. The panel-only phrases:
       refute_match "Granted via", response.body

test/controllers/admin/groups_controller_test.rb

@@ -27,7 +27,7 @@ module Admin
       @group.applications = [applications(:kavita_app)]
 
       patch admin_group_path(@group), params: {
-        group: { name: @group.name }
+        group: {name: @group.name}
       }
 
       assert_redirected_to admin_group_path(@group)

test/controllers/api/forward_auth_controller_test.rb

@@ -186,7 +186,7 @@ module Api
       # Under default-deny the user must be in at least one group to access the app.
       # This rewritten test verifies that when an app's headers_config disables the
       # groups header, no x-remote-groups is sent regardless of memberships.
-      app = grant_everyone_access Application.create!(
+      grant_everyone_access Application.create!(
         name: "Headers Hidden", slug: "headers-hidden", app_type: "forward_auth",
         domain_pattern: "hidden.example.com",
         active: true,
@@ -559,7 +559,7 @@ module Api
     end
 
     test "should track failed attempts and eventually rate limit" do
-      cache = Rails.application.config.forward_auth_cache
+      Rails.application.config.forward_auth_cache
 
       # Make 50 failed requests (no session = unauthorized)
       50.times do

test/test_helpers/session_test_helper.rb

@@ -17,7 +17,11 @@ module SessionTestHelper
   # written under the old "empty allowed_groups = public" rule keep working.
   # New tests should attach groups explicitly to model real access intent.
   def grant_everyone_access(app)
-    everyone = (groups(:everyone) rescue Group.find_by(auto_assign: true))
+    everyone = begin
+      groups(:everyone)
+    rescue
+      Group.find_by(auto_assign: true)
+    end
     app.allowed_groups << everyone unless app.allowed_groups.include?(everyone)
     app
   end