CVE-2026-90578 GPAC MP4Box list.c gf_list_count use after free
A use-after-free flaw in GPAC MP4Box allows local attackers to potentially execute code or cause denial of service via crafted media files.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-90578?
CVE-2026-90578 is a medium-severity use after free vulnerability in GPAC, published on 13 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A flaw has been found in GPAC up to f1219cde. Affected by this issue is the function gf_list_count of the file utils/list.c of the component MP4Box. Executing a manipulation can lead to use after free. The attack is restricted to local execution. The exploit has been published and may be used. Upgrading to version abi-16.23 can resolve this issue. This patch is called 49dee5cad329cfed310c1682703df7daa47df31a. It is suggested to upgrade the affected component.
Which versions are affected by CVE-2026-90578?
How do I fix CVE-2026-90578?
No fix has been published for CVE-2026-90578 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-90578 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90578 exists.
Sources
Also known as GHSA-4j36-28vc-v5w9, UBUNTU-CVE-2026-90578.