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CSRF: per-session HMAC token #6

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opened 2026-07-10 13:15:42 +02:00 by qwc · 0 comments
qwc commented 2026-07-10 13:15:42 +02:00
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Labels: security, web, hardening
Priority: high (before any non-prototype deployment)

The prototype relies on SameSite=Lax alone. Add a per-session HMAC CSRF token in a hidden field, verified on every state-changing route.

  • Mint + embed token in forms
  • Verify on POST handlers
  • Tests (missing/invalid token → 403)
**Labels:** `security`, `web`, `hardening` **Priority:** high (before any non-prototype deployment) The prototype relies on `SameSite=Lax` alone. Add a per-session HMAC CSRF token in a hidden field, verified on every state-changing route. - [ ] Mint + embed token in forms - [ ] Verify on POST handlers - [ ] Tests (missing/invalid token → 403)
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qwc-open/tulli#6
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