Integer overflow in coTURN - CVE-2026-68552
Published: August 3, 2026
Vulnerability identifier: #VU140776
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-68552
CWE-ID: CWE-190
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to integer overflow or wraparound in stun_get_message_len_str() when processing crafted STUN messages over TCP/TLS connections. A remote attacker can send a specially crafted STUN message with an oversized body-length field to cause a denial of service.
The issue can be triggered before STUN authentication and affects only the attacking client's own TCP/TLS session by desynchronizing the stream parser and dropping the connection.
Affected software
coTURN
How to mitigate CVE-2026-68552
Install security update from vendor's website.
coTURN - update to 4.15.0