What is CVE-2026-97026?

CVE-2026-97026 is a low-severity vulnerability in Red Hat Enterprise Linux 10, classified under Creation of Temporary File With Insecure Permissions. CVSS score: 3.9/10. Published 2026-09-28.

How severe is CVE-2026-97026?

Low severity. CVSS v3 base score is 3.9 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

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.

Published 2026-09-28.

CVSS v3 metric

CVSS v3 base score 3.9 (Low). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:N/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

CWE-378 — Creation of Temporary File With Insecure Permissions

References

access.redhat.com/security/cve/CVE-2026-97026 (vdb-entry)
bugzilla.redhat.com/show_bug.cgi (issue-tracking)
github.com/flatpak/flatpak/security/advisories/GHSA-r9w3-qx54-qvc8

Frequently asked questions

What is CVE-2026-97026?: CVE-2026-97026 is a low-severity vulnerability in Red Hat Enterprise Linux 10, classified under Creation of Temporary File With Insecure Permissions. CVSS score: 3.9/10. Published 2026-09-28.
How severe is CVE-2026-97026?: Low severity. CVSS v3 base score is 3.9 out of 10.