flatpak: Flatpak passes through arbitrary vendor-extension keys unmodified when exporting an application's Desktop Entry (.des...
CVE-2026-97027 is fixed in flatpak on 1 platform, first by DEBIAN-CVE-2026-97027, released September 29, 2026. It is not reported as exploited. Patch Radar priority: Routine.
Flatpak passes through arbitrary vendor-extension keys unmodified when exporting an application's Desktop Entry (.desktop) and D-Bus Service (.service) files, instead of validating against an allowlist. A malicious Flatpak app can use this to cause denial of service (e.g. forced application restart loops) or to influence host D-Bus/systemd activation behavior beyond what the sandbox is intended to permit.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| flatpak · Debian 13.5 (trixie) | 1.16.6-1~deb13u3 | DEBIAN-CVE-2026-97027 | Sep 29, 2026 |
| flatpak · Debian 14 | 1.18.4-1 | DEBIAN-CVE-2026-97027 | Sep 29, 2026 |
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