CVE-2026-65981

A flaw was found in Coturn, an open-source implementation of TURN and STUN servers. An authenticated attacker who obtains a victim's MOBILITY-TICKET can exploit this vulnerability during a session resume. This allows the attacker to take over the victim's TURN Traversal Using Relays around NAT...

CVE-2026-65981 Coturn: MOBILITY-TICKET session-resume authorization bypass allows cross-user TURN allocation takeover

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, a server using --mobility authenticates a resumed REFRESH request with the resuming user's credentials but does not verify that identity against the original allocation owner, allowing an authenticated attacker...

CVE-2026-65981 Coturn: MOBILITY-TICKET session-resume authorization bypass allows cross-user TURN allocation takeover

Coturn is a free open source implementation of TURN and STUN Server. Prior to 4.15.0, a server using --mobility authenticates a resumed REFRESH request with the resuming user's credentials but does not verify that identity against the original allocation owner, allowing an authenticated attacker...

CVE-2026-65981

CVE-2026-65981 affects Coturn prior to 4.15.0. A MOBILITY-TICKET–based session-resume flaw allows an authenticated attacker to bypass per-allocation authorization: a resumed REFRESH is validated against the attacker’s identity instead of the original allocation owner, enabling cross-user receipt ...