flatpak: A malicious OCI registry can hardlink arbitrary host files into the extraction directory when a user installs or upda...
CVE-2026-96279 is fixed in flatpak on 1 platform by DEBIAN-CVE-2026-96279 (version 1.18.1-1), released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.
A malicious OCI registry can hardlink arbitrary host files into the extraction directory when a user installs or updates a Flatpak application from an OCI remote, allowing disclosure of arbitrary host file contents. For system-wide installs running as root, this includes sensitive files such as /etc/shadow.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| flatpak · Debian 14 | 1.18.1-1 | DEBIAN-CVE-2026-96279 | Sep 23, 2026 |
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