CVE-2026-73212CWE-284CWE-918broken-access-controlssrf

CVE-2026-73212

published August 11, 2026

CVSS
5.8
EPSS
0%
Percentile
41.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
5.8 · NONE
CVSS v4.0
Not supplied
EPSS
0.00496 · 41.7th percentile
Weaknesses
CWE-284 · Improper Access Control; CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-08-11T22:18Z
References (6)
https://github.com/coturn/coturn/commit/cf4b4952de48510d38415b96300da5fc674bfdda · [email protected]https://github.com/coturn/coturn/commit/d49ee56aa9fe748af064853d5e430eec1ccc3cbc · [email protected]https://github.com/coturn/coturn/pull/1945 · [email protected]https://github.com/coturn/coturn/pull/1947 · [email protected]https://github.com/coturn/coturn/releases/tag/4.13.1 · [email protected]https://github.com/coturn/coturn/security/advisories/GHSA-2x4g-wx24-48m4 · [email protected]
EPSS history
Timeline
  • 11 AUG 17:31Z
    coturn peer-IP ACL canonicalization & scope bypass on the RFC 6062 TCP CONNECT relay path → internal-network SSRF and proven internal root RCE
    cvelistv5