# CVE-2026-96279: 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.

- Web page: https://patchblox.com/security/cve/CVE-2026-96279
- Priority: Routine
- CVSS: 6.5 (medium)
- EPSS: 0.0043
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 27, 2026

## Description

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

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | flatpak Debian 14 | 1.18.1-1 | [DEBIAN-CVE-2026-96279](https://patchblox.com/security/data/fix/linux/debian-cve-2026-96279.md) | Sep 23, 2026 |

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Data as of 2026-11-09T01:18:40Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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