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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | gnome-tweaks | No fix yet | — |
| Debian 13 | gnome-tweaks | No fix yet | — |
| Debian 12 | gnome-tweaks | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | gnome-tweaks | No fix yet | — |
| Ubuntu 26.04 LTS | gnome-tweaks | No fix yet | — |
| Ubuntu 24.04 LTS | gnome-tweaks | No fix yet | — |
| Ubuntu 22.04 LTS | gnome-tweaks | No fix yet | — |
| Ubuntu 20.04 LTS | gnome-tweaks | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | gnome-tweaks | No fix yet | — |
References
- https://access.redhat.com/security/cve/CVE-2026-74859 vdb-entry
- RHBZ#2529702 issue-tracking