a365059976
- Reduce access_token_ttl from 900s to 300s (5 min) to shrink XSS exploit window - Add session_id claim to JWT tokens tied to browser session (X-Session-Id header) - Flask middleware validates session_id matches header on every request - CSP headers: default-src/script-src 'self', no unsafe-inline/eval, frame-ancestors none - X-Content-Type-Options: nosniff on all responses - Move refresh token from localStorage to sessionStorage (tab-scoped, cleared on close) - Timing-safe password verification (dummy Argon2id for unknown users) - WebSocket auth also validates session_id header - Add 5 session_id tests and 3 CSP header tests