Pion STUN vulnerable to remote denial of service via panic while parsing a malformed XOR-MAPPED-ADDRESS attribute

{
  "id": "ce8aa38bd4b97bcf4db8605658bbe527ac2e125e35d3ab59722f2557bdc7e2bc",
  "url": "https://osv.dev/vulnerability/CVE-2026-54909",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "Pion STUN vulnerable to remote denial of service via panic while parsing a malformed XOR-MAPPED-ADDRESS attribute",
    "summary": "pion/stun is a Go implementation of STUN. Prior to 3.1.3, XORMappedAddress.GetFromAs can panic while parsing a malformed short XOR-MAPPED-ADDRESS attribute in STUN or ICE Binding-response parsing paths, allowing remote denial of service. This issue is fixed in version 3.1.3.",
    "evidence": "osv:CVE-2026-54909",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2026-54909",
      "aliases": [
        "CVE-2026-54909",
        "GHSA-34rh-wp3j-6cxc",
        "GO-2026-6163"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/pion/stun",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "fa9f074a33a8059c76c960b1fbee39f308002423"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.1.3"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  },
                  {
                    "range": [
                      {
                        "fixed": "fa9f074a33a8059c76c960b1fbee39f308002423"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  },
                  {
                    "range": [
                      {
                        "fixed": "fa9f074a33a8059c76c960b1fbee39f308002423"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "v3.1.3"
                  },
                  {
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.1.3"
                      }
                    ],
                    "source": "DESCRIPTION"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v3.1.2",
            "v3.1.1",
            "v3.1.0",
            "v3.0.2",
            "v3.0.1",
            "v2.0.1",
            "v0.6.1",
            "v3.0.0",
            "v2.0.0",
            "v0.6.0",
            "v0.5.2",
            "v0.5.1",
            "v0.5.0",
            "v0.4.0",
            "v0.3.5",
            "v0.3.4",
            "v0.3.3",
            "v0.3.2",
            "v0.3.1",
            "v0.3.0",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54909.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:35.859642189Z",
      "provider": "osv",
      "references": [
        "https://github.com/pion/stun/releases/tag/v3.1.3",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54909.json",
        "https://github.com/pion/stun/security/advisories/GHSA-34rh-wp3j-6cxc",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-54909",
        "https://github.com/pion/stun/commit/fa9f074a33a8059c76c960b1fbee39f308002423",
        "https://github.com/pion/stun/pull/278"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-20"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54909.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-54909",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 503438,
  "published_at": "2026-07-31T22:03:53.514+00:00"
}