CVE-2026-73215

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

Published: Aug 11, 2026Updated: Sep 9, 2026 Sources: CVE List NVDCWE-400

N/ACVSS

NVD MITRE

Description

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.

No summary for this CVE yet.

Weaknesses

CWE-400 CWE-772

Affected Products

coturn

oss-project

coturnOn-prem

Networking Infrastructure / load-balancer-proxy

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

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References

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

github.com

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