CVE WatchAug 11, 2026

CVE-2026-73215

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

CVSS

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No CVSS

EPSS

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KEV

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Exploit Today

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0-100

Published: Aug 11, 2026 · Last modified: Aug 11, 2026 · CWE-400 · CWE-772

EPSS · 30d

Not enough EPSS history yet.

Technical 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.

Official references

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