CVE-2026-59846: Libssh

Low severity, CVSS 3.9. EPSS: 0.1% chance of exploitation in the next 30 days.

A flaw was found in libssh. A malicious username expanded through %r in ProxyCommand handling can inject shell metacharacters, exposing environment variables and causing unintended shell behavior.

Affected products

• Libssh Libssh: affected versions not specified
• Red Hat Enterprise Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Red Hat Hardened Images: affected versions not specified

Published 2026-07-21. Last modified 2026-09-01.