How severe is CVE-2026-34079?

CVE-2026-34079 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-34079 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-34079?

CVE-2026-34079 affects Flatpak. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-34079?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-34079 have an EU (EUVD) identifier?

Yes. CVE-2026-34079 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19971.

When was CVE-2026-34079 published?

CVE-2026-34079 was published on 2026-04-07 and last updated on 2026-06-17.

CVE-2026-34079

CVE-2026-34079 is a high-severity vulnerability in Flatpak with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v4: 8.7
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-19971
Weakness: CWE-22
Affected product: Flatpak
Published: 2026-04-07
Last modified: 2026-06-17

Description

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 Prior to 1.16.4, the caching for ld.so removes outdated cache files without properly checking that the app controlled path to the outdated cache is in the cache directory.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.

Frequently asked questions

What is 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 Prior to 1.16.4, the caching for ld.so removes outdated cache files without properly checking that the app controlled path to the outdated cache is in the cache directory.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.
How severe is CVE-2026-34079?: CVE-2026-34079 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-34079 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-34079?: CVE-2026-34079 affects Flatpak. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-34079?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-34079 have an EU (EUVD) identifier?: Yes. CVE-2026-34079 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-19971.
When was CVE-2026-34079 published?: CVE-2026-34079 was published on 2026-04-07 and last updated on 2026-06-17.

References

https://github.com/flatpak/flatpak/security/advisories/GHSA-p29x-r292-46pp

Affected products (1)

cpe:2.3:a:flatpak:flatpak:*:*:*:*:*:*:*:*

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