CVE-2026-74859: Red Hat Enterprise Linux 8

Medium severity, CVSS 6.8. EPSS: 0.2% chance of exploitation in the next 30 days.

The shell theme installer in gnome-tweaks extracts user-supplied ZIP archives without validating archive member paths. As a result, a crafted theme archive can write files outside ~/.themes by using ../ path traversal, absolute paths, or symlink entries.

Affected products

• Red Hat Red Hat Enterprise Linux 8
• Red Hat Red Hat Enterprise Linux 9

Published 2026-09-08. Last modified 2026-09-09.