Creation of Temporary File With Insecure Permissions Affecting flatpak package, versions <1.16.6-1~deb13u3


Severity

Recommended
0.0
low
0
10

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Threat Intelligence

EPSS
0.11% (2nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-FLATPAK-20257451
  • published29 Sept 2026
  • disclosed28 Sept 2026

Introduced: 28 Sep 2026

NewCVE-2026-97026  (opens in a new tab)
CWE-378  (opens in a new tab)

How to fix?

Upgrade Echo:latest flatpak to version 1.16.6-1~deb13u3 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 Echo. See How to fix? for Echo:latest relevant fixed versions and status.

Flatpak creates temporary child repository directories under the user cache with world-writable permissions (0777). On multi-user systems with a permissive umask, other local users could read or modify the temporary directory used while installing apps or runtimes, potentially causing installation failures (denial of service); tampered content would fail signature/digest verification rather than being trusted.

CVSS Base Scores

version 3.1