Improper access control in Flatpak - CVE-2026-96283
Published: April 8, 2026 / Updated: September 28, 2026
Vulnerability identifier: #VU125293
CSH Severity: Low
CVSS v4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-96283
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to cause a denial of service.
The vulnerability exists due to improper access control in org.freedesktop.Flatpak.SystemHelper.CancelPull when handling a CancelPull request for another user's ongoing pull. A remote user can invoke CancelPull on another user's pull to cause a denial of service.
Affected software
Flatpak
How to mitigate CVE-2026-96283
Install security update from vendor's website.
Flatpak - update to 1.16.4