GHSA-7ww3-xvf5-cxwm: ciguard Web UI Is Missing HTTP Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-7ww3-xvf5-cxwm",
  "modified" : "2026-05-05T22:20:04Z",
  "published" : "2026-05-05T22:20:04Z",
  "aliases" : [ ],
  "summary" : "ciguard: Web UI is missing HTTP defence-in-depth headers",
  "details" : "## Summary\n\nciguard's FastAPI Web UI (`src/ciguard/web/app.py`) does not set HTTP defence-in-depth headers. OWASP ZAP baseline scan flagged 11 alerts: missing Content-Security-Policy (Medium), X-Frame-Options (Medium), Sub-Resource-Integrity on `/api/docs` (Medium), COOP / COEP / CORP (Low), Permissions-Policy (Low), X-Content-Type-Options (Low).\n\n## Threat scenario\n\nFor local-only deployment (current intent): minimal — there's no untrusted browser context, no third-party hosting, no auth surface to protect.\n\nFor public hosting (PRD Slice 9 GitHub App or hosted dashboard, future): each missing header reduces a defence layer:\n\n- Missing CSP → injected XSS would have no second-line defence (first-line Jinja autoescape remains intact)\n- Missing X-Frame-Options → clickjacking against any UI button would be possible\n- Missing SRI on jsdelivr-hosted Swagger UI → if jsdelivr were compromised, attacker JS would run in the docs page context\n\n## Patch\n\n- New `SecurityHeadersMiddleware` at `src/ciguard/web/security_headers.py` injecting: X-Content-Type-Options nosniff, X-Frame-Options DENY, Referrer-Policy no-referrer, Permissions-Policy `interest-cohort=()`, Cross-Origin-Opener-Policy same-origin, Cross-Origin-Resource-Policy same-origin, plus per-path CSP with `/api/docs` + `/api/redoc` carve-out for cdn.jsdelivr.net (Swagger UI / ReDoc dependency).\n- COEP intentionally NOT set: would break Swagger UI's cross-origin assets, and ciguard makes no SharedArrayBuffer use that would benefit.\n- Registered via `app.add_middleware(SecurityHeadersMiddleware)`.\n- 6 regression tests in `tests/test_web.py::TestSecurityHeaders`.\n\n## Discovery\n\nFound by OWASP ZAP baseline scan during ciguard's first self-conducted pentest cycle, 2026-04-26.\n\n## CVSS Scoring\n\n- CVSS v3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N` — 4.3 (Medium per v3.1 thresholds)\n- CVSS v4.0: `CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N` — first.org calc 4.3 (Low); GitHub's calc 2.1 (Low). All consistent at Low/borderline.\n\n## Verification\n\n```\n$ curl -sI http://127.0.0.1:8080/ | grep -E '^(X-Frame|X-Content|Referrer|Permissions|Cross-Origin|Content-Security):'\n# Pre-fix: empty\n# Post-fix: 7 headers present\n```\n\n## Resources\n\n- Fix released in [v0.8.2](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2)\n- CI regression gate added in [v0.8.3](https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3)",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "PyPI",
      "name" : "ciguard"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.1.0"
      }, {
        "fixed" : "0.8.2"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 0.8.1"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/Jo-Jo98/ciguard/security/advisories/GHSA-7ww3-xvf5-cxwm"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/Jo-Jo98/ciguard"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.2"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/Jo-Jo98/ciguard/releases/tag/v0.8.3"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-693" ],
    "severity" : "LOW",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-05-05T22:20:04Z",
    "nvd_published_at" : null
  }
}