CVE-2026-4631
CRITICAL EPSS 96.1%
Published Apr 7, 20262mo ago · Modified Jun 17, 20262w ago
9.8 CVSS 3.1
Published Apr 7, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
96.1% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-78 OS Command Injection Injection
References 7
- openwall.com http://www.openwall.com/lists/oss-security/2026/04/10/5
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:7381
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:7382
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:7383
- access.redhat.com https://access.redhat.com/errata/RHSA-2026:7384
- access.redhat.com https://access.redhat.com/security/cve/CVE-2026-4631
- bugzilla.redhat.com https://bugzilla.redhat.com/show_bug.cgi?id=2450246
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.