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8.8 High

A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via…

CVE-2026-96275

A malicious or compromised Flatpak repository can write attacker-controlled content to arbitrary locations on the host filesystem via extractextradata(). On system installs, the write happens as root. Two issues combine: files/extra is resolved via path operations that follow symlinks, and blob names from xa.extra-data-sources are not sanitized against .. traversal.

Assessment

CVSS
8.8 (v3.1)
Severity
High
EPSS
0.56% chance of exploitation in the next 30 days
Known exploited
Not listed in CISA KEV
Exploit availability
Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published
23 September 2026
Last updated
2 November 2026
Assigner
redhat

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

At the source

References

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