CVE-2026-96275

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

State: Published
Severity: 8.8 High
Published: Sep 23, 2026
Updated: Nov 2, 2026
Reserved: Sep 22, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	redhat

Weaknesses

CWE-22 Improper Limitation of a Pathname to a Restricted Directory

Affected Products

Product	Versions
Red Hat Enterprise Linux 10Red Hat	0:1.16.0-9.el10_2.4 and laterNot affected
Red Hat Enterprise Linux 8Red Hat	0:1.12.9-7.el8_10 and laterNot affected
Red Hat Enterprise Linux 9Red Hat	0:1.12.9-4.el9_8.4 and laterNot affected
Red Hat Enterprise Linux 9.2 Update Services for SAP SolutionsRed Hat	0:1.12.7-5.el9_2.5 and laterNot affected
Red Hat Enterprise Linux 9.4 Update Services for SAP SolutionsRed Hat	0:1.12.9-3.el9_4.5 and laterNot affected
Red Hat Enterprise Linux 9.6 Extended Update SupportRed Hat	0:1.12.9-4.el9_6.5 and laterNot affected
Red Hat Enterprise Linux 7Red Hat

References

RHSA-2026:80497vendor-advisory
RHSA-2026:80498vendor-advisory
RHSA-2026:80687vendor-advisory
RHSA-2026:89733vendor-advisory
RHSA-2026:90364vendor-advisory
RHSA-2026:92369vendor-advisory
https://access.redhat.com/security/cve/CVE-2026-96275vdb-entry
RHBZ#2539416issue-tracking
https://github.com/flatpak/flatpak/security/advisories/GHSA-fqx6-vh4p-42cg

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