CVE-2026-96275

Published: Sep 23, 2026Modified: Oct 26, 2026

8.8

Vector

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

Exploitability: 2.8 / Impact: 5.9

Source: secalert@redhat.com (Secondary)

Description

A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extract_extra_data(). On system installs, the write happens as root. Two issues combine: `files/extra` is resolved via path operations that follow symlinks, and blob names from `xa.extra-data-sources` are not sanitized against `..` traversal.

Related CWEs

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

References (7)

https://access.redhat.com/errata/RHSA-2026:80497

Source: secalert@redhat.com

https://access.redhat.com/errata/RHSA-2026:80498

Source: secalert@redhat.com

https://access.redhat.com/errata/RHSA-2026:80687

Source: secalert@redhat.com

https://access.redhat.com/errata/RHSA-2026:89733

Source: secalert@redhat.com

https://access.redhat.com/security/cve/CVE-2026-96275

Source: secalert@redhat.com

https://bugzilla.redhat.com/show_bug.cgi?id=2539416

Source: secalert@redhat.com

https://github.com/flatpak/flatpak/security/advisories/GHSA-fqx6-vh4p-42cg

Source: secalert@redhat.com

Timeline

No history available yet.