Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/coturn/coturn/commit/cf4b4952de48510d38415b96300da5fc674bfdda
- https://github.com/coturn/coturn/commit/d49ee56aa9fe748af064853d5e430eec1ccc3cbc
- https://github.com/coturn/coturn/pull/1945
- https://github.com/coturn/coturn/pull/1947
- https://github.com/coturn/coturn/releases/tag/4.13.1
- https://github.com/coturn/coturn/security/advisories/GHSA-2x4g-wx24-48m4
FAQ
What is CVE-2026-73212?
CVE-2026-73212 is a documented vulnerability. 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 ca...
How severe is CVE-2026-73212?
CVSS scoring is not yet available for CVE-2026-73212. Check NVD for updates.
Is there a patch for CVE-2026-73212?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.