CVE-2026-73212

Name	CVE-2026-73212
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.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
coturn (PTS)	bullseye	4.5.2-3	vulnerable
	bookworm	4.6.1-1	vulnerable
	trixie	4.6.1-2	vulnerable
	forky, sid	4.15.0-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
coturn	source	(unstable)	4.14.0-1

Notes

https://github.com/coturn/coturn/security/advisories/GHSA-2x4g-wx24-48m4
https://github.com/coturn/coturn/pull/1945
Fixed by: https://github.com/coturn/coturn/commit/cf4b4952de48510d38415b96300da5fc674bfdda (4.13.1)
https://github.com/coturn/coturn/pull/1947
Fixed by: https://github.com/coturn/coturn/commit/d49ee56aa9fe748af064853d5e430eec1ccc3cbc (4.13.1)