CVE-2026-15185 GPAC MP4Box vobsub.c vobsub_read_idx out-of-bounds
A local attacker can trigger an out-of-bounds read in GPAC MP4Box via crafted input, potentially causing crashes or information disclosure.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-15185?
CVE-2026-15185 is a medium-severity memory corruption vulnerability in GPAC, published on 9 Jul 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was determined in GPAC 26.03-DEV. This affects the function vobsub_read_idx of the file /src/media_tools/vobsub.c of the component MP4Box. Executing a manipulation of the argument num_langs can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called 532097084729a936bcdf6a27c41003f3bd7dc3ff. It is best practice to apply a patch to resolve this issue. Two different commits were applied to fix this issue.
Which versions are affected by CVE-2026-15185?
How do I fix CVE-2026-15185?
No fix has been published for CVE-2026-15185 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-2026-15185 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15185 exists.
Sources
Also known as DEBIAN-CVE-2026-15185, GHSA-fp8c-v4q6-8572, UBUNTU-CVE-2026-15185.