CVE-2026-91090 GPAC base_scenegraph.c gf_node_activate_ex stack-based overflow
A local attacker can exploit a stack-based buffer overflow in GPAC's scenegraph activation to potentially execute arbitrary code.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-91090?
CVE-2026-91090 is a low-severity memory corruption vulnerability in GPAC, published on 15 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A vulnerability was determined in GPAC up to f1219cde. The affected element is the function gf_node_activate_ex of the file scenegraph/base_scenegraph.c. This manipulation causes stack-based buffer overflow. It is possible to launch the attack on the local host. The exploit has been publicly disclosed and may be utilized. Upgrading to version abi-16.23 is sufficient to fix this issue. Patch name: 9eb40df4448b88d6a6ce3454657c06f47eff0b24. The affected component should be upgraded.
Which versions are affected by CVE-2026-91090?
How do I fix CVE-2026-91090?
No fix has been published for CVE-2026-91090 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-91090 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91090 exists.
Sources
Also known as GHSA-q4xw-4662-gq27, UBUNTU-CVE-2026-91090.