CVE-2026-73215CWE-400CWE-772denial-of-service

CVE-2026-73215

published August 11, 2026

CVSS
7.1
EPSS
0%
Percentile
38.2
In the wild
Unconfirmed
What it is

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, turnports_allocate_even() in src/apps/relay/turn_ports.c marks the unused odd sibling port as TPS_TAKEN_ODD for an EVEN-PORT Allocate request with reservation bit R=0 even though no RTCP socket will release it, allowing an authenticated client to permanently exhaust the relay port pool and cause subsequent allocations to fail with STUN error 508. This issue is fixed in version 4.17.0.

The record
Technical detail
CVSS
7.1 · NONE
CVSS v4.0
Not supplied
EPSS
0.00451 · 38.2th percentile
Weaknesses
CWE-400 · Uncontrolled Resource Consumption; CWE-772 · Missing Release of Resource after Effective Lifetime
Published
2026-08-11T22:18Z
References (3)
https://github.com/coturn/coturn/commit/4adbd82e78456e13109bf44deed4ec3aceb0bab2 · [email protected]https://github.com/coturn/coturn/releases/tag/4.17.0 · [email protected]https://github.com/coturn/coturn/security/advisories/GHSA-847g-qmc6-6m4r · [email protected]
EPSS history
Timeline
  • 11 AUG 17:38Z
    The coturn server can end in a state where it does not accept more requests with "even-port" enabled.
    cvelistv5