CVE-2026-73215

UNKNOWN 0.0

The coturn server can end in a state where it does not accept more requests with "even-port" enabled.

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-400 CWE-772
Vendor	coturn
Product	coturn
Published	Aug 11, 2026

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Affected Versions

coturn / coturn

< 4.17.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/coturn/coturn/security/advisories/GHSA-847g-qmc6-6m4r github.com: https://github.com/coturn/coturn/commit/4adbd82e78456e13109bf44deed4ec3aceb0bab2 github.com: https://github.com/coturn/coturn/releases/tag/4.17.0