Improper Access Control Affecting coturn package, versions <4.14.0-1
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-DEBIANUNSTABLE-COTURN-18616787
- published12 Aug 2026
- disclosed11 Aug 2026
Introduced: 11 Aug 2026
NewCVE-2026-73212 (opens in a new tab)How to fix?
Upgrade Debian:unstable coturn to version 4.14.0-1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream coturn package and not the coturn package as distributed by Debian.
See How to fix? for Debian:unstable relevant fixed versions and status.
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.
References
- https://security-tracker.debian.org/tracker/CVE-2026-73212
- 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