Security advisory

{
  "id": "dc5d4a2fa30fe2fafa1932216d72b7069d86656d903ab03c046060387d02ff6c",
  "url": "https://osv.dev/vulnerability/CVE-2020-27813",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-27813",
    "summary": "An integer overflow vulnerability exists with the length of websocket frames received via a websocket connection. An attacker would use this flaw to cause a denial of service attack on an HTTP Server allowing websocket connections.",
    "evidence": "osv:CVE-2020-27813",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2020-27813",
      "aliases": [
        "CVE-2020-27813",
        "GHSA-3xh2-74w9-5vxm",
        "GHSA-jf24-p9p9-4rjh",
        "GO-2020-0019"
      ],
      "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/gorilla/websocket",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "c3e18be99d19e6b3e8f1559eea2c161a665c4b6b"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:gorillatoolkit:websocket:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.4.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.4.0",
            "v1.3.0",
            "v1.2.0",
            "v1.1.0",
            "v1.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-27813.json"
          }
        }
      ],
      "modified": "2026-10-20T10:53:01.843071298Z",
      "provider": "osv",
      "references": [
        "https://lists.debian.org/debian-lts-announce/2023/05/msg00012.html",
        "https://github.com/gorilla/websocket/security/advisories/GHSA-jf24-p9p9-4rjh",
        "https://lists.debian.org/debian-lts-announce/2021/01/msg00008.html",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1902111"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "vendor_product": "debian:debian_linux",
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "9.0"
                  },
                  {
                    "last_affected": "9.0"
                  }
                ],
                "source": "CPE_STRING"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-27813",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 384151,
  "published_at": "2020-12-02T01:15:12.78+00:00"
}