What is CVE-2026-34079?

CVE-2026-34079 is a high-severity vulnerability in Flatpak, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-04-07.

How severe is CVE-2026-34079?

High severity. CVSS v3 base score is 7.5 out of 10.

Path Traversal in Flatpak

CVE-2026-34079

Flatpak is a Linux application sandboxing and distribution framework. Prior to 1.16.4, the caching for ld.so removes outdated cache files without properly checking that the app controlled path to the outdated cache is in the cache directory. This allows Flatpak apps to delete arbitrary files on the host. This vulnerability is fixed in 1.16.4.

Vulnerability class: Path Traversal (Directory Traversal)

EPSS: 0.003 (24.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N.

Affected products

Flatpak — versions < 1.16.4

Weakness classification (CWE)

CWE-22 — Path Traversal

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-34079?: CVE-2026-34079 is a high-severity vulnerability in Flatpak, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-04-07.
How severe is CVE-2026-34079?: High severity. CVSS v3 base score is 7.5 out of 10.