CVE-2026-96808 Flatpak - Privilege Escalation

Flatpak < 1.18.1 contains a local privilege escalation caused by symlink traversal in revokefs writer used by flatpak-system-helper, letting local attackers modify root-controlled files and escalate privileges, exploit requires active local session.

CVSS base score 7.4 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.12% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Privilege Escalation
Impact
Privilege Escalation, Data Tampering, File System Write
CVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
23 September 2026
Updated
15 October 2026
Weakness
CWE-61

Vendor fix

Update to version 1.18.1 or later.

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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