CVE-2026-6626

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. An authenticated local user with a large user identifier (UID) can cause unauthorized modification and disclosure of login records. On 32-bit systems, an integer overflow during session accounting allows the user's login process to read or overwrite the legacy log entries of other accounts.

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.