CVE-2026-5235 Axiomatic Bento4 MP4 File Ap4Dac4Atom.cpp ReadCache heap-based overflow
A heap-based buffer overflow in the Bento4 MP4 parser allows local attackers to execute arbitrary code or cause denial of service via crafted files.
- 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-2026-5235?
CVE-2026-5235 is a medium-severity memory corruption vulnerability in Axiomatic Bento4, published on 31 Mar 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 Axiomatic Bento4 up to 1.6.0-641. This impacts the function AP4_BitReader::ReadCache of the file Ap4Dac4Atom.cpp of the component MP4 File Parser. This manipulation causes heap-based buffer overflow. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-5235?
How do I fix CVE-2026-5235?
No fix has been published for CVE-2026-5235 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-2026-5235 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-5235 exists.
Sources
Also known as GHSA-g59j-6cjm-qfw8.