Description
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.
Problem types
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Product status
0:344-3.el10_1 (rpm) before *
0:334.1-3.el10_0 (rpm) before *
0:344-2.el9_7 (rpm) before *
0:344-2.el9_7 (rpm) before *
0:334.2-2.el9_6 (rpm) before *
Timeline
| 2026-03-23: | Reported to Red Hat. |
| 2026-04-07: | Made public. |
Credits
Red Hat would like to thank Florian Kohnhäuser for reporting this issue.
References
www.openwall.com/lists/oss-security/2026/04/10/5
access.redhat.com/errata/RHSA-2026:7381 (RHSA-2026:7381)
access.redhat.com/errata/RHSA-2026:7382 (RHSA-2026:7382)
access.redhat.com/errata/RHSA-2026:7383 (RHSA-2026:7383)
access.redhat.com/errata/RHSA-2026:7384 (RHSA-2026:7384)
access.redhat.com/security/cve/CVE-2026-4631
bugzilla.redhat.com/show_bug.cgi?id=2450246 (RHBZ#2450246)