Directory Traversal Affecting flatpak package, versions <1.6.5-0ubuntu0.5+esm1


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.44% (36th percentile)

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  • Snyk IDSNYK-UBUNTU2004-FLATPAK-15982708
  • published8 Sept 2026
  • disclosed7 Apr 2026

Introduced: 7 Apr 2026

CVE-2026-34079  (opens in a new tab)
CWE-22  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 flatpak to version 1.6.5-0ubuntu0.5+esm1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream flatpak package and not the flatpak package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

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 Prior to 1.16.4, the caching for ld.so removes outdated cache files without properly checking that the app controlled path to the outdated cache is in the cache directory.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.

CVSS Base Scores

version 3.1