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CVE-2026-96275high8.8

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

Impact

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.

Source excerpt · redhat

What to do

Avoid installing Flatpak extensions from non-trusted sources.

redhat guidance

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Red Hat · Red Hat Enterprise Linux 10

Other versions: affected

Version / rangeSource status
0:1.16.0-9.el10_2.4 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 8

Other versions: affected

Version / rangeSource status
0:1.12.9-7.el8_10 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 9

Other versions: affected

Version / rangeSource status
0:1.12.9-4.el9_8.4 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Other versions: affected

Version / rangeSource status
0:1.12.9-3.el9_4.5 to before *unaffected
redhat version evidence

Red Hat · Red Hat Enterprise Linux 9.6 Extended Update Support

Other versions: affected

Version / rangeSource status
0:1.12.9-4.el9_6.5 to before *unaffected
redhat version evidence

Original source 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.

References