Security advisory

{
  "id": "5d800b1aae63b9b103f63491efd59730cf6b762c8423656006bebbafda96a9ef",
  "url": "https://osv.dev/vulnerability/CVE-2025-51495",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2025-51495",
    "summary": "An integer overflow vulnerability exists in the WebSocket component of Mongoose 7.5 thru 7.17. By sending a specially crafted WebSocket request, an attacker can cause the application to crash. If downstream vendors integrate this component improperly, the issue may lead to a buffer overflow.",
    "evidence": "osv:CVE-2025-51495",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2025-51495",
      "aliases": [
        "CVE-2025-51495"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cesanta/mongoose",
              "type": "GIT",
              "events": [
                {
                  "introduced": "9d38e26b817b6b151fd925e9a8420a46c99a8375"
                },
                {
                  "last_affected": "0a86bc0af22173b8c952c11551a067fd6f843d83"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:cesanta:mongoose:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "7.5"
                      },
                      {
                        "last_affected": "7.17"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "7.17",
            "7.16",
            "7.15",
            "7.14",
            "7.13",
            "7.12",
            "7.11",
            "7.8",
            "7.7",
            "7.6",
            "7.5"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-51495.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:25.489244049Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/51xxx/CVE-2025-51495.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2025-51495",
        "https://github.com/cesanta/mongoose/pull/3131",
        "https://github.com/cainiao159357/CVE-2025-51495",
        "https://github.com/cesanta/mongoose"
      ],
      "provider_metadata": {
        "cna_assigner": "mitre",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/51xxx/CVE-2025-51495.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2025-51495",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 491798,
  "published_at": "2025-09-29T00:00:00+00:00"
}