CVE-2026-91088 GPAC URL url.c gf_url_concatenate_ex heap-based overflow
A heap-based buffer overflow in GPAC's URL handler allows local attackers to execute arbitrary code or cause denial of service.
- 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-2026-91088?
CVE-2026-91088 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 has been found in GPAC up to f1219cde. This issue affects the function gf_url_concatenate_ex of the file utils/url.c of the component URL Handler. The manipulation leads to heap-based buffer overflow. An attack has to be approached locally. Upgrading to version abi-16.23 is capable of addressing this issue. The identifier of the patch is afca1f1181668d85941d51ed1adf647807d5d975. It is advisable to upgrade the affected component.
Which versions are affected by CVE-2026-91088?
How do I fix CVE-2026-91088?
No fix has been published for CVE-2026-91088 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-2026-91088 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-91088 exists.
Sources
Also known as GHSA-g97h-4r58-8hcm, UBUNTU-CVE-2026-91088.