CVE-2026-97026

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 v3 3.9 LOW

3.9^/10

CVSS v3 : LOW

Vector :

Exploitability : 1.3 / Impact : 2.5

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-97026
https://bugzilla.redhat.com/show_bug.cgi?id=2542637
https://github.com/flatpak/flatpak/security/advisories/GHSA-r9w3-qx54-qvc8

Configurations

No configuration.

History

28 Sep 2026, 21:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-28 21:17

Updated : 2026-09-30 21:17

NVD link : CVE-2026-97026

Mitre link : CVE-2026-97026

CVE.ORG link : CVE-2026-97026

JSON object : View

Products Affected

No product.

CWE

CWE-378

Creation of Temporary File With Insecure Permissions

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