CVE-2026-73216

mediumCVSS 6.5covered by 1 sourcefirst seen 2026-08-11

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.

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Exploitation outlook

Low exploitation risk0.40% 30-day exploitation probability — currently an unlikely target, but scores change as exploit code circulates. Riskier than 33% of all EPSS-scored CVEs.

Advisory coverage (1)

mediumCVE-2026-73216: Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.17.0, shutdown…nvd · 2026-08-11

External references

NVD record for CVE-2026-73216

CVE.org record

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