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.
History

Wed, 30 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 29 Sep 2026 13:30:00 +0000

Type Values Removed Values Added
First Time appeared Flatpak
Flatpak flatpak
Vendors & Products Flatpak
Flatpak flatpak

Tue, 29 Sep 2026 13:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Low


Mon, 28 Sep 2026 21:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Flatpak: flatpak: world-writable temporary child repositories in system-helper cache path
First Time appeared Redhat
Redhat enterprise Linux
Weaknesses CWE-378
CPEs cpe:/o:redhat:enterprise_linux:10
cpe:/o:redhat:enterprise_linux:7
cpe:/o:redhat:enterprise_linux:8
cpe:/o:redhat:enterprise_linux:9
Vendors & Products Redhat
Redhat enterprise Linux
References
Metrics cvssV3_1

{'score': 3.9, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L'}


cve-icon MITRE

Status: PUBLISHED

Assigner: redhat

Published: 2026-09-28T20:57:03.702Z

Updated: 2026-09-30T20:11:11.704Z

Reserved: 2026-09-23T21:11:59.431Z

Link: CVE-2026-97026

cve-icon Vulnrichment

Updated: 2026-09-30T19:42:17.386Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-28T21:17:19.907

Modified: 2026-09-30T21:17:19.057

Link: CVE-2026-97026

cve-icon Redhat

Severity : Low

Publid Date: 2026-09-28T13:28:31Z

Links: CVE-2026-97026 - Bugzilla