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Vulnerability record · CVE-2026-96275 · published 23 September 2026

CVE-2026-96275: Path traversal vulnerability

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.

8.8 CVSS 3.1 High EPSS 0.36% · top 72.7% CWE-22 · Path traversal Awaiting Analysis
8.8CVSS 3.1 base score
0.36%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
3References
25 Sep 2026Last modified by NVD

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

References

LinkTags
https://access.redhat.com/security/cve/CVE-2026-96275
https://bugzilla.redhat.com/show_bug.cgi?id=2539416
https://github.com/flatpak/flatpak/security/advisories/GHSA-fqx6-vh4p-42cg

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Source: NIST National Vulnerability Database (record CVE-2026-96275), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.