CVE-2026-96283 Flatpak: flatpak: flatpak-system-helper cross-user cancelpull orphans another user's ongoing pull
A local attacker can orphan another user's ongoing Flatpak pulls by calling the system helper, preventing the owner from stopping them.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-96283?
CVE-2026-96283 is a low-severity missing authorization vulnerability in Red Hat Enterprise Linux 10, published on 27 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
By calling org.freedesktop.Flatpak.SystemHelper.CancelPull on another user's pull, the pull is not actually cancelled but removed from internal tracking, making it impossible for the owning user to stop it. Ongoing pulls cannot be stopped.
Weakness: CWE-862
Which versions are affected by CVE-2026-96283?
How do I fix CVE-2026-96283?
Apply the vendor's patch.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-96283 being exploited?
There is no known exploitation of CVE-2026-96283 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-96283, UBUNTU-CVE-2026-96283.