{
  "canonical_id": "express--CVE-2025-67731",
  "system_id": "express",
  "display_name": "Express",
  "category": "frameworks",
  "advisory_mode": "core",
  "title": "CVE-2025-67731",
  "summary": "Servify Express is a Node.js package to start an Express server and log the port it's running on. Prior to 1.2, the Express server used express.json() without a size limit, which could allow attackers to send extremely large request bodies. This can cause excessive memory usage, degraded performance, or process crashes, resulting in a Denial of Service (DoS). Any application using the JSON parser without limits and exposed to untrusted clients is affected. The issue is not a flaw in Express itself, but in configuration. This issue is fixed in version 1.2. To work around, consider adding a limit option to the JSON parser, rate limiting at the application or reverse-proxy level, rejecting unusually large requests before parsing, or using a reverse proxy (such as NGINX) to enforce maximum request body sizes.",
  "published_at": "2025-12-12T08:15:48.367",
  "updated_at": "2026-03-17T19:40:55.690",
  "severity": "high",
  "cvss_score": 7.5,
  "exploit_status": "unknown",
  "source_confidence": "ecosystem-authority",
  "official_source_url": "https://github.com/Aarondoran/servify-express/commit/8dff7f56504b356278d849734ef2050e5cd23b61",
  "secondary_source_urls": [
    "https://github.com/Aarondoran/servify-express/releases/tag/V1.2",
    "https://github.com/Aarondoran/servify-express/security/advisories/GHSA-qgc4-8p88-4w7m"
  ],
  "aliases": [
    "CVE-2025-67731"
  ],
  "cve_ids": [
    "CVE-2025-67731"
  ],
  "ghsa_ids": [],
  "osv_ids": [],
  "affected_versions": [],
  "fixed_versions": [],
  "package_name": null,
  "render_markdown": false,
  "case_path": null,
  "secure_code_topics": [
    "xss-output-encoding",
    "ssrf-url-validation",
    "proxy-trust-boundary",
    "dependency-upgrade-policy"
  ],
  "status": "triage",
  "triage_reasons": [
    "missing affected/fixed version details"
  ],
  "verification_status": "triage-manual",
  "verification_mode": "synthetic",
  "last_verified_at": null,
  "last_run_id": null,
  "evidence_bundle": null,
  "historical_status": null,
  "latest_status": null,
  "browser_evidence": {
    "required": false,
    "present": false,
    "refs": []
  },
  "repro_profile_id": "xss-generic",
  "artifact_mode": "synthetic",
  "blocked_reason": null,
  "metadata": {
    "source_names": [
      "NVD Express.js"
    ],
    "source_kinds": [
      "nvd-search"
    ],
    "candidate_count": 1
  }
}