Security advisory

{
  "id": "9e1511fb09be8736870b4a5b5ad7a6d757adc034c0b054a80f87f45e37ae5ebf",
  "url": "https://osv.dev/vulnerability/CVE-2021-4236",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-4236",
    "summary": "Web Sockets do not execute any AuthenticateMethod methods which may be set, leading to a nil pointer dereference if the returned UserData pointer is assumed to be non-nil, or authentication bypass. This issue only affects WebSockets with an AuthenticateMethod hook. Request handlers that do not explicitly use WebSockets are not vulnerable.",
    "evidence": "osv:CVE-2021-4236",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-4236",
      "aliases": [
        "CVE-2021-4236",
        "GHSA-5gjg-jgh4-gppm",
        "GHSA-jpgg-cp2x-qrw3",
        "GO-2021-0107"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/ecnepsnai/web",
              "type": "GIT",
              "events": [
                {
                  "introduced": "44e6297e6edfd25cca373c37d68bbfe84fbb474c"
                },
                {
                  "fixed": "5a78f8d5c41ce60dcf9f61aaf47a7a8dc3e0002f"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:web_project:web:*:*:*:*:*:go:*:*",
                    "range": [
                      {
                        "introduced": "1.4.0"
                      },
                      {
                        "fixed": "1.5.2"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "5a78f8d5c41ce60dcf9f61aaf47a7a8dc3e0002f"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.5.1",
            "v1.5.0",
            "v1.4.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4236.json"
          }
        }
      ],
      "modified": "2026-10-20T10:55:00.805132635Z",
      "provider": "osv",
      "references": [
        "https://github.com/ecnepsnai/web/commit/5a78f8d5c41ce60dcf9f61aaf47a7a8dc3e0002f",
        "https://pkg.go.dev/vuln/GO-2021-0107"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-4236",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386677,
  "published_at": "2022-12-27T22:15:12.013+00:00"
}