CVE-2026-73213CWE-863broken-access-control

CVE-2026-73213

published August 11, 2026

CVSS
5.8
EPSS
0%
Percentile
34.6
In the wild
Unconfirmed
What it is

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.16.0, addr_less_eq() in src/client/ns_turn_ioaddr.c uses a component-wise comparison for native IPv6 min-max intervals in ioa_addr_in_range(), allowing an authenticated TURN client to relay to an IPv6 peer that is numerically within a configured non-prefix-aligned denied-peer-ip range but is classified as outside it. This issue is fixed in version 4.16.0.

The record
Technical detail
CVSS
5.8 · NONE
CVSS v4.0
Not supplied
EPSS
0.00414 · 34.6th percentile
Weakness
CWE-863 · Incorrect Authorization
Published
2026-08-11T22:18Z
References (4)
https://github.com/coturn/coturn/commit/6c13608c28a04af5d63abddd7565a0dcc4771c28 · [email protected]https://github.com/coturn/coturn/releases/tag/4.16.0 · [email protected]https://github.com/coturn/coturn/security/advisories/GHSA-4v97-rxjj-4f99 · [email protected]https://github.com/coturn/coturn/security/advisories/GHSA-4v97-rxjj-4f99 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 11 AUG 17:33Z
    Coturn: `addr_less_eq()` does a component-wise IPv6 comparison instead of a lexicographic one, letting an authenticated TURN client bypass `denied-peer-ip`/`allowed-peer-ip` IPv6 ranges (TURN-specific SSRF)
    cvelistv5