CVE-2026-91087 GPAC Compositor media_object.c gf_mo_get_od_id use after free
A remote attacker can trigger a use-after-free in GPAC's compositor, potentially leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-91087?
CVE-2026-91087 is a medium-severity use after free vulnerability in GPAC, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A flaw has been found in GPAC up to f1219cde. This vulnerability affects the function gf_mo_get_od_id of the file compositor/media_object.c of the component Compositor. Executing a manipulation can lead to use after free. The attack may be performed from remote. The exploit has been published and may be used. Upgrading to version abi-16.24 is able to resolve this issue. This patch is called e34f4ba349d55cd1849f0bcf4cf46552732e2db7. Upgrading the affected component is advised.
Which versions are affected by CVE-2026-91087?
How do I fix CVE-2026-91087?
No fix has been published for CVE-2026-91087 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-2026-91087 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91087 exists.
Sources
Also known as GHSA-w6cq-hc26-45wr, UBUNTU-CVE-2026-91087.