CVE-2026-4480: Red Hat Enterprise Linux

Critical severity, CVSS 9.0. EPSS: 13.9% chance of exploitation in the next 30 days.

A flaw was found in the Samba printing subsystem. Samba passes the client-controlled job description string to the command configured with the "print command" setting via the "%J" substitution character without escaping shell meta characters. A remote attacker could exploit this vulnerability by sending a specially crafted print job description that contains unescaped shell characters. This could lead to remote code execution on the affected system.

Affected products

• Red Hat Enterprise Linux: version 7.0 only; version 8.0 only; version 9.0 only; version 10.0 only
• Red Hat Openshift Container Platform: version 4.0 only
• Samba Samba: from 4.1.0, before 4.2.1 (fixed in 4.2.1)

Published 2026-05-26. Last modified 2026-09-01.