CVE-2026-74859

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 symlink entries.

Affected Software

Weaknesses

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

References

• https://access.redhat.com/security/cve/CVE-2026-74859
• https://bugzilla.redhat.com/show_bug.cgi?id=2529702

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