LOW 3.9 NVD
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 umas
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.
Remediation
$ sudo apt install --only-upgrade flatpakReferences
- 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
This low severity vulnerability with a CVSS score of 3.9 was published on 2026-09-28 via NVD. A remediation command is available below.
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