{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "4.13.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "cf4b4952de48510d38415b96300da5fc674bfdda"
            },
            {
              "fixed": "d49ee56aa9fe748af064853d5e430eec1ccc3cbc"
            },
            {
              "fixed": "f696c74fced6a5c05df555139e51cfce6b3e2802"
            }
          ],
          "repo": "https://github.com/coturn/coturn",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-2x4g-wx24-48m4"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-284",
      "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73212.json"
  },
  "details": "Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.13.1, good_peer_addr() in src/server/ns_turn_server.c uses ioa_addr_in_range() in src/client/ns_turn_ioaddr.c without canonicalizing IPv4-compatible, 6to4, and 64:ff9b::/96 NAT64 address forms, allowing an authenticated RFC 6062 TCP CONNECT relay client to bypass an IPv4 denied-peer-ip range when the Coturn host has a useful translation route. This issue is fixed in version 4.13.1.",
  "id": "CVE-2026-73212",
  "modified": "2026-08-13T03:51:42.082010641Z",
  "published": "2026-08-11T17:31:43.961Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/coturn/coturn/releases/tag/4.13.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73212.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/coturn/coturn/security/advisories/GHSA-2x4g-wx24-48m4"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73212"
    },
    {
      "type": "FIX",
      "url": "https://github.com/coturn/coturn/commit/cf4b4952de48510d38415b96300da5fc674bfdda"
    },
    {
      "type": "FIX",
      "url": "https://github.com/coturn/coturn/commit/d49ee56aa9fe748af064853d5e430eec1ccc3cbc"
    },
    {
      "type": "FIX",
      "url": "https://github.com/coturn/coturn/pull/1945"
    },
    {
      "type": "FIX",
      "url": "https://github.com/coturn/coturn/pull/1947"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H",
      "type": "CVSS_V4"
    }
  ],
  "summary": "coturn peer-IP ACL canonicalization \u0026 scope bypass on the RFC 6062 TCP CONNECT relay path → internal-network SSRF and proven internal root RCE"
}