{
  "canonical_id": "nextjs--CVE-2025-49005",
  "system_id": "nextjs",
  "display_name": "Next.js",
  "category": "frameworks",
  "advisory_mode": "core",
  "title": "Next.js has a Cache poisoning vulnerability due to omission of the Vary header",
  "summary": "### Summary\n\nA cache poisoning issue in **Next.js App Router >=15.3.0 and < 15.3.3** may have allowed RSC payloads to be cached and served in place of HTML, under specific conditions involving middleware and redirects. This issue has been fixed in **Next.js 15.3.3**.\n\nUsers on affected versions should **upgrade immediately** and **redeploy** to ensure proper caching behavior.\n\nMore details: [CVE-2025-49005](https://vercel.com/changelog/cve-2025-49005)",
  "published_at": "2025-07-03T20:30:18Z",
  "updated_at": "2026-02-04T02:37:18.974477Z",
  "severity": "low",
  "cvss_score": 3.1,
  "exploit_status": "unknown",
  "source_confidence": "official",
  "official_source_url": "https://github.com/vercel/next.js/security/advisories/GHSA-r2fc-ccr8-96c4",
  "secondary_source_urls": [
    "https://nvd.nist.gov/vuln/detail/CVE-2025-49005",
    "https://github.com/vercel/next.js/issues/79346",
    "https://github.com/vercel/next.js/pull/79939",
    "https://github.com/vercel/next.js/commit/ec202eccf05820b60c6126d6411fe16766ecc066",
    "https://github.com/vercel/next.js",
    "https://github.com/vercel/next.js/releases/tag/v15.3.3",
    "https://vercel.com/changelog/cve-2025-49005"
  ],
  "aliases": [
    "CVE-2025-49005",
    "GHSA-r2fc-ccr8-96c4"
  ],
  "cve_ids": [
    "CVE-2025-49005"
  ],
  "ghsa_ids": [
    "GHSA-r2fc-ccr8-96c4"
  ],
  "osv_ids": [
    "GHSA-r2fc-ccr8-96c4"
  ],
  "affected_versions": [
    "introduced=15.3.0, fixed<15.3.3"
  ],
  "fixed_versions": [
    "15.3.3"
  ],
  "package_name": "next",
  "render_markdown": true,
  "case_path": "07-framework-security/frameworks/nextjs/cases/nextjs-cve-2025-49005.md",
  "secure_code_topics": [
    "authz-server-side-recheck",
    "proxy-trust-boundary",
    "token-cookie-storage"
  ],
  "status": "generated",
  "triage_reasons": [],
  "verification_status": "verified-real",
  "verification_mode": "real",
  "last_verified_at": "2026-03-18T03:57:47+00:00",
  "last_run_id": "nextjs-nextjs--CVE-2025-49005-20260318035740",
  "evidence_bundle": "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740",
  "historical_status": "verified-real",
  "latest_status": "verified-real",
  "browser_evidence": {
    "required": false,
    "present": true,
    "refs": [
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/assets/baseline.png",
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/assets/baseline-dom.html",
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/logs/baseline-console.json",
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/logs/baseline-network.json",
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/logs/baseline-page.json",
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/assets/proof.png",
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/assets/proof-dom.html",
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/logs/proof-console.json",
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/logs/proof-network.json",
      "/Users/x/websafe/06-case-studies/generated-runs/nextjs-nextjs--CVE-2025-49005-20260318035740/logs/proof-page.json"
    ]
  },
  "repro_profile_id": "nextjs-proxy-boundary",
  "artifact_mode": "local-fixture",
  "blocked_reason": null,
  "metadata": {
    "source_names": [
      "OSV Next.js"
    ],
    "source_kinds": [
      "osv-batch"
    ],
    "candidate_count": 1
  }
}