CVE-2026-90827 GPAC MP4Box base_scenegraph.c gf_node_deactivate_ex use after free
A local attacker can exploit a use-after-free flaw in GPAC MP4Box to potentially execute arbitrary code or cause a denial of service.
- 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-2026-90827?
CVE-2026-90827 is a medium-severity use after free vulnerability in GPAC, published on 14 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was identified in GPAC 26.07.0. This affects the function gf_node_deactivate_ex of the file scenegraph/base_scenegraph.c of the component MP4Box. Such manipulation leads to use after free. The attack must be carried out locally. The exploit is publicly available and might be used. Upgrading to version abi-16.23 is able to mitigate this issue. The name of the patch is 49dee5cad329cfed310c1682703df7daa47df31a. You should upgrade the affected component.
Which versions are affected by CVE-2026-90827?
How do I fix CVE-2026-90827?
No fix has been published for CVE-2026-90827 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-2026-90827 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90827 exists.
Sources
Also known as GHSA-gr8c-qjcx-xc56, UBUNTU-CVE-2026-90827.