Is CVE-2026-91149 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-91149?

CVE-2026-91149 has a CVSS v3 severity of HIGH (7.5).

Back

CVE-2026-91149

Description

A flaw was found in Cockpit. An unauthenticated remote attacker can exploit this vulnerability by initiating and sustaining numerous simultaneous connections to the `cockpit-tls` service. This forces the service to create an unbounded number of detached threads, consuming system resources such as memory and file descriptors. The primary consequence is a denial of service (DoS), leading to degradation or complete unavailability of the Cockpit service for legitimate users.