CVE-2026-96275 — Flatpak: flatpak: arbitrary write access as root via extra-data extraction
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, t…
Published: 2026-09-23 · CVSS: 8.8 · CVSS 3.1
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: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7