CVE-2026-91142

Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation. An attacker with network access to the Cockpit web service can craft a single HTTP request to the login endpoint that injects malicious SSH options or shell commands, achieving code execution on the Cockpit host without valid credentials.

A vulnerability in Cockpit allows an unauthenticated remote attacker to initiate and sustain numerous simultaneous connections to the cockpit-tls service, forcing it to create an unbounded number of threads and consume system resources such as memory and file descriptors. The result is a denial of service (DoS).

A flaw was found in Cockpit that allows a remote attacker to execute arbitrary commands on the host by exploiting unsanitized user-controlled parameters in the system logs UI. An attacker can inject shell metacharacters and command substitutions, leading to arbitrary shell command execution on the affected system.

Directory traversal vulnerability in the Buckets component of Cockpit 2.13.5 and earlier. Allows authenticated attackers to write files to arbitrary locations within the uploads directory or overwrite assets with malicious versions.

A vulnerability was detected in Cockpit-HQ Cockpit up to 2.13.5 affecting some unknown functionality of the Asset Handler/Aggregate Handler component. The manipulation results in improper neutralization of special elements in data query logic. The attack can be launched remotely, and the exploit is now public.