CVE-2026-74859

gnome-tweaks: path traversal in theme installer

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Severity

Moderate

Red Hat Product Security

6.8

CVSS 3.1

Review impact separately from score.

Published · April 19, 2026

Updated · September 8, 2026

Description

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.

Statement

This vulnerability is rated Moderate because it requires a user to actively install a specially crafted GNOME Shell theme via the gnome-tweaks utility. Exploitation is not possible without user interaction and the deliberate installation of a malicious theme, limiting the attack surface in typical Red Hat desktop environments.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 6.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H

CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')