CVE-2026-107466

flatpak-builder: A flaw was found in flatpak-builder

CVE-2026-107466 is fixed in flatpak-builder on 1 platform by DEBIAN-CVE-2026-107466 (version 1.4.11-1), released October 9, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
6.1
medium
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0019
8th percentile

A flaw was found in flatpak-builder. This vulnerability allows an attacker to cause information disclosure by convincing a user or continuous integration (CI) system to process a crafted build manifest. By specifying local file Uniform Resource Identifiers (URIs) within source download definitions, the builder bypasses directory confinement checks. As a result, sensitive host files accessible to the build process can be read and incorporated into the build artifacts.

Where it's fixed

ProductFixed inFixReleased
Linux
flatpak-builder · Debian 14 1.4.11-1 DEBIAN-CVE-2026-107466 Oct 9, 2026

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