EUVD-2026-19971CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Lifecycle Timeline
3Tags
Description
Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the caching for ld.so removes outdated cache files without properly checking that the app controlled path to the outdated cache is in the cache directory. This allows Flatpak apps to delete arbitrary files on the host. This vulnerability is fixed in 1.16.4.
Analysis
Arbitrary file deletion in Flatpak versions prior to 1.16.4 allows sandboxed applications to delete files on the host system via path traversal during ld.so cache cleanup. The vulnerability stems from improper validation of application-controlled paths when removing outdated cache files, enabling applications to escape sandbox constraints and delete arbitrary host files. …
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Remediation
Within 24 hours: Inventory all systems running Flatpak and identify installed application versions; document current Flatpak version across infrastructure. Within 7 days: Establish monitoring for Flatpak vulnerability tracking channels and configure alerts for patch availability; disable Flatpak functionality on high-value systems if business operations permit, or restrict to trusted/internal applications only. …
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