Medium 5.8Published Aug 11, 2026

CVE-2026-73212coturn peer-IP ACL canonicalization & scope bypass on the RFC 6062 TCP CONNECT relay path → internal-network SSRF and proven internal root RCE

Updated under an hour ago (2026-10-19 10:10 UTC)

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No exploitation reported and no EPSS estimate yet.

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Every CVE for coturn

Exploited in the last 30 days

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.

CVSS: 5.8 MEDIUM (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:H
Weakness (CWE): CWE-284, CWE-918
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Aug 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

coturn coturn coturn:coturn (from the name)	before 4.13.1	CNA record

References

https://github.com/coturn/coturn/security/advisories/GHSA-2x4g-wx24-48m4x-refsource-confirm
https://github.com/coturn/coturn/pull/1945x-refsource-misc
https://github.com/coturn/coturn/pull/1947x-refsource-misc
https://github.com/coturn/coturn/commit/cf4b4952de48510d38415b96300da5fc674bfddax-refsource-misc
https://github.com/coturn/coturn/commit/d49ee56aa9fe748af064853d5e430eec1ccc3cbcx-refsource-misc
https://github.com/coturn/coturn/releases/tag/4.13.1x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.