What is CVE-2026-74859?

CVE-2026-74859 is a medium-severity vulnerability in Red Hat Enterprise Linux 8, classified under Path Traversal. CVSS score: 6.8/10. Published 2026-09-08.

How severe is CVE-2026-74859?

Medium severity. CVSS v3 base score is 6.8 out of 10.

Path Traversal in Red Hat Enterprise Linux 8

CVE-2026-74859

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.

Vulnerability class: Path Traversal (Directory Traversal)

CVSS v3 metric

CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:H/A:H.

Affected products

Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Weakness classification (CWE)

CWE-22 — Path Traversal

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)

Frequently asked questions

What is CVE-2026-74859?: CVE-2026-74859 is a medium-severity vulnerability in Red Hat Enterprise Linux 8, classified under Path Traversal. CVSS score: 6.8/10. Published 2026-09-08.
How severe is CVE-2026-74859?: Medium severity. CVSS v3 base score is 6.8 out of 10.