CVE-2026-90791 GPAC MP4Box base_scenegraph.c gf_node_unregister use after free
A use-after-free vulnerability in GPAC MP4Box allows remote attackers to execute arbitrary code or cause denial of service via crafted media files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-90791?
CVE-2026-90791 is a medium-severity use after free vulnerability in GPAC, published on 14 Sep 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
A vulnerability was detected in GPAC up to f1219cde. This vulnerability affects the function gf_node_unregister of the file scenegraph/base_scenegraph.c of the component MP4Box. The manipulation results in use after free. The attack can be executed remotely. The exploit is now public and may be used. Upgrading to version abi-16.23 is able to resolve this issue. The patch is identified as 9eb40df4448b88d6a6ce3454657c06f47eff0b24. Upgrading the affected component is recommended.
Which versions are affected by CVE-2026-90791?
How do I fix CVE-2026-90791?
No fix has been published for CVE-2026-90791 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-2026-90791 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-90791 exists.
Sources
Also known as GHSA-6x7f-5vmr-66vm, UBUNTU-CVE-2026-90791.