---
id: CVE-2026-74859
title: >-
  The shell theme installer in gnome-tweaks extracts user-supplied ZIP archives
  without validating archive member paths
summary: >-
  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…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H'
cwe:
  - CWE-22
vendor: Red Hat
product: gnome-tweaks
affected:
  - gnome-tweaks (all versions)
  - gnome-tweaks (all versions)
published: '2026-09-08'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T16:17:04.610'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74859'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-74859'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2529702'
    label: secalert@redhat.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74859.json
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-74859'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-74859'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-09-09T15:57:06.754426Z'
epss: 0.00173
epssPercentile: 0.05891
ingestedAt: '2026-09-08T15:33:26.983Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-09-08 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74859.json)