CVE-2026-96275 Flatpak - Unrestricted File Upload

Flatpak contains an unrestricted file write caused by improper path resolution and lack of sanitization in extract_extra_data(), letting attackers write arbitrary files as root on system installs, exploit requires malicious or compromised repository.

CVSS base score 8.8 /10
High
CISA KEV
Not listed
Public exploit
None known
EPSS
0.40% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Unrestricted File Upload
Impact
File System Write, Privilege Escalation
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-22

Vendor fix

Update to the latest Flatpak version with the fix.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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