8.8 High

CVE-2026-96275 Flatpak: flatpak: arbitrary write access as root via extra-data extraction

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.

CVSS 3.1 detail

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

Exploitable remotely over the network, without an account and if a user takes an action; an attacker can seriously compromise confidentiality, integrity or availability.

Attack vector: Network
Attack complexity: Low
Privileges required: None
Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Affected products and versions

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 10	Versions not published
Red Hat Enterprise Linux 7	Versions not published
Red Hat Enterprise Linux 8	Versions not published
Red Hat Enterprise Linux 9	Versions not published
Red Hat Enterprise Linux 9.6 Extended Update Support	Versions not published
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions	Versions not published
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions	Versions not published
Red Hat Enterprise Linux 10.0 Extended Update Support	Versions not published
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support	Versions not published

Show the other branch

Product	Affected versions	Fixed in
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On	Versions not published

References

RHSA-2026:80497 access.redhat.com
RHSA-2026:80498 access.redhat.com
RHSA-2026:80687 access.redhat.com
RHSA-2026:89733 access.redhat.com
RHSA-2026:90364 access.redhat.com
RHSA-2026:92221 access.redhat.com
RHSA-2026:92369 access.redhat.com
RHSA-2026:95493 access.redhat.com
access.redhat.com access.redhat.com
RHBZ#2539416 bugzilla.redhat.com
github.com github.com

Timeline

Published September 23, 2026
Last modified November 5, 2026

The 1454 CVEs of Red Hat Enterprise Linux 10 →

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