CVE-2026-90683 GPAC MP4Box base_scenegraph.c gf_node_unregister assertion
A local attacker can trigger a reachable assertion in GPAC MP4Box, causing 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-2026-90683?
CVE-2026-90683 is a medium-severity denial of service 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 detected in GPAC up to f1219cde. Affected is the function gf_node_unregister of the file scenegraph/base_scenegraph.c of the component MP4Box. Performing a manipulation results in reachable assertion. Attacking locally is a requirement. The exploit is now public and may be used. Upgrading to version abi-16.23 is able to address this issue. The patch is named 49dee5cad329cfed310c1682703df7daa47df31a. It is advisable to upgrade the affected component. This is not a duplicate of CVE-2021-46237 or CVE-2021-46234.
Weakness: CWE-617
Which versions are affected by CVE-2026-90683?
How do I fix CVE-2026-90683?
No fix has been published for CVE-2026-90683 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-90683 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90683 exists.
Sources
Also known as GHSA-vcmh-wc7m-59v8, UBUNTU-CVE-2026-90683.