CVE-2026-108539 GPAC MP4Box filter_queue.c gf_fq_pop use after free
A use-after-free vulnerability in GPAC's MP4Box allows remote attackers to potentially execute 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-2026-108539?
CVE-2026-108539 is a medium-severity use after free vulnerability in GPAC, published on 11 Oct 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 26.07.0. This affects the function gf_fq_pop of the file filter_core/filter_queue.c of the component MP4Box. Performing a manipulation results in use after free. The attack may be initiated remotely. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-108539?
How do I fix CVE-2026-108539?
No fix has been published for CVE-2026-108539 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-2026-108539 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108539 exists.
Sources
Also known as GHSA-7m7x-953c-ffrf, UBUNTU-CVE-2026-108539.