Resource exhaustion in coTURN - CVE-2026-68555
Published: August 3, 2026
Vulnerability identifier: #VU140774
CSH Severity: Low
CVSS v4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-68555
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to uncontrolled resource consumption in the mobility resume transition handling in src/server/ns_turn_server.c when processing chained authenticated mobility resume requests. A remote user can repeatedly resume one allocation from new UDP 5-tuples without completing the handoff to cause a denial of service.
Only deployments with the --mobility feature enabled are affected, and the issue can persist even when the allocation quota is set to one.
Affected software
coTURN
How to mitigate CVE-2026-68555
Install security update from vendor's website.
coTURN - update to 4.16.0