CVE-2026-4631
Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection
- Published
- Apr 7, 2026
- Updated
- Aug 4, 2026
- Assigning CNA
- redhat
- Evidence observed
- May 21, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HModerate · next 30 days
- Percentile
- 96.7%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
Cockpit's remote login feature passes user-supplied hostnames and usernames from the web interface to the SSH client without validation or sanitization. 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. The injection occurs during the authentication flow before any credential verification takes place, meaning no login is required to exploit the vulnerability.
Sources
3- CVE-2026-4631-cockpit-RCEExploit
Cockpit: Unauthenticated Remote Code Execution via SSH Command-Line Argument Injection
- CVE-2026-4631-cockpit-RCEExploit
Unauthenticated Remote Code Execution via SSH Command-Line Argument Injection Cockpit versions 327 – 359 | CVSS 9.8 Critical | CWE-78
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