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πŸ›‘οΈ Sentinel: Harden security headers and improve CSP consistency#57

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πŸ›‘οΈ Sentinel: Harden security headers and improve CSP consistency#57
google-labs-jules[bot] wants to merge 1 commit into
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sentinel-security-hardening-2536189552405342294

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πŸ›‘οΈ Sentinel: Security Hardening

🚨 Severity: MEDIUM (Enhancement)

πŸ’‘ Vulnerability:

  • Missing key security headers (HSTS, Permissions-Policy).
  • Legacy X-XSS-Protection configuration.
  • Inconsistent CSP between main site and documentation.
  • Invalid CSP directive (frame-ancestors) in meta tag.

🎯 Impact:

  • Lack of HSTS could allow downgrade attacks (SSL stripping).
  • Unrestricted browser features (camera, mic) could be exploited if an XSS occurred.
  • Inconsistent CSP could lead to blocked assets or bypasses.

πŸ”§ Fix:

  • Implemented Strict-Transport-Security, Permissions-Policy, and updated X-XSS-Protection in next.config.ts.
  • Synchronized CSP across next.config.ts and docs/layout.tsx.
  • Removed frame-ancestors from meta tags as it's ignored by browsers in that context (kept in headers).

βœ… Verification:

  • Ran pnpm build and pnpm --filter docs build (Successful).
  • Ran pnpm test (All 23 unit tests passed).
  • Ran pnpm test:e2e (All 4 E2E tests passed).
  • Verified header logic via manual review.

PR created automatically by Jules for task 2536189552405342294 started by @amrabed

- Add Strict-Transport-Security (HSTS) with preload and subdomains.
- Add Permissions-Policy to restrict sensitive browser features.
- Update X-XSS-Protection to 0 (opting for CSP-based protection).
- Fix CSP inconsistency between main app and docs.
- Remove invalid frame-ancestors from docs meta-tag.
- Maintain unsafe-eval to prevent regressions in Next.js/Nextra.
@google-labs-jules

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vercel Bot commented Jun 27, 2026

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Project Deployment Actions Updated (UTC)
typescript Ready Ready Preview, Comment Jun 27, 2026 4:20am

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