Flatpak extra_data Download Symlinks Combined with Path Traversal Write Files to Arbitrary Host Paths as Root, Scoring 8.8
Last refreshed2026-10-30
Status: UPDATED
| Advisory ID: CVE-2026-96275
Key Details
CVE
CVE-2026-96275
CVSS Score / Version
8.8 (High) / CVSS v3.1
Updated
2026-10-29
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS Prose
attack vector is network; attack complexity is low; privileges required is none; user interaction is required; scope is unchanged; confidentiality impact is high; integrity impact is high; availability impact is high.
Affected products
Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, and Red Hat Enterprise Linux 7
Classified as
CWE-22 (Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal'))
Exploitation prediction (EPSS)
0.40% probability of exploitation in the next 30 days (32% percentile) -- FIRST.org's EPSS model.
Affected Products, Subsystems & Sectors
Vendor
Product
Affected Versions
Patch Status
Red Hat
Red Hat Enterprise Linux 10
Red Hat
Red Hat Enterprise Linux 8
Red Hat
Red Hat Enterprise Linux 9
Red Hat
Red Hat Enterprise Linux 7
Subsystems
OT Supporting Infrastructure
Sectors
Multiple
What to Know
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. (NVD)
What to Do
Monitor Red Hat's web page for any future patch releases.