{"id":"CVE-2026-73212","title":"Coturn is a free open source implementation of TURN and STUN Server","summary":"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, a…","severity":"none","cwe":["CWE-284","CWE-918"],"published":"2026-08-11","updated":"2026-09-09","sourceUpdated":"2026-09-09T20:55:04.493","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-73212","references":[{"url":"https://github.com/coturn/coturn/commit/cf4b4952de48510d38415b96300da5fc674bfdda","label":"security-advisories@github.com"},{"url":"https://github.com/coturn/coturn/commit/d49ee56aa9fe748af064853d5e430eec1ccc3cbc","label":"security-advisories@github.com"},{"url":"https://github.com/coturn/coturn/pull/1945","label":"security-advisories@github.com"},{"url":"https://github.com/coturn/coturn/pull/1947","label":"security-advisories@github.com"},{"url":"https://github.com/coturn/coturn/releases/tag/4.13.1","label":"security-advisories@github.com"},{"url":"https://github.com/coturn/coturn/security/advisories/GHSA-2x4g-wx24-48m4","label":"security-advisories@github.com"}],"tags":["nvd"],"epss":0.00496,"epssPercentile":0.40007,"ingestedAt":"2026-09-09T21:22:45.528Z","slug":"CVE-2026-73212","body":"## Overview\n\nCoturn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}