CVE-2026-4631
Critical
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Red Hat Enterprise Linux 10
PublishedApr 7, 2026
First seenApr 7, 2026
Weakness typeCWE-78OS command injection
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat Red Hat Enterprise Linux 10 | No range specified | — |
| Red Hat Red Hat Enterprise Linux 10.0 Extended Update Support | No range specified | — |
| enterprise_linux 9 | No range specified | — |
| rhel_eus 9.6 | No range specified | — |
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