CVE-2026-73216

6.5 mediumEPSS 0.6%

Medium (6.5). EPSS 0.6% chance of exploitation in the next 30 days.

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, shutdown_client_connection() in src/server/ns_turn_server.c prematurely calls dec_quota() and releases bandwidth accounting during the first-stage close of a mobility-enabled allocation while preserving the allocation, relay socket, session, and mobility ticket, allowing an authenticated client to bypass --user-quota and --total-quota and exhaust relay ports. This issue is fixed in version 4.17.0.

Severity

CVSS 3.1

6.5 medium

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.6% chance of exploitation in the next 30 days; higher than 47% of CVEs (scores of 2026-10-31)
CWE: CWE-400
Published: 2026-08-11
Modified: 2026-09-09
Record from: the NVD, synced 2026-10-19

References

https://github.com/coturn/coturn/commit/3c5b2615fd405c4e7c5bf3fbeef895c94a90671b
https://github.com/coturn/coturn/releases/tag/4.17.0
https://github.com/coturn/coturn/security/advisories/GHSA-f6hc-79w3-p8pq

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