Quick answers
- Is CVE-2026-88376 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-88376 being exploited in the wild.
- How severe is CVE-2026-88376?
- High severity, with a CVSS score of 7.5, published 24 September 2026.
- Which products and versions are affected?
- Axiomatic Systems Bento4 1.6.0.0.
- Is there a fix for CVE-2026-88376?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-88376 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-88376?
- Check whether you run Axiomatic Systems Bento4 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
An integer underflow in AP4_AvccAtom::Create() and AP4_HvccAtom::Create() occurs when parsing avcC or hvcC atoms with a declared size smaller than the 8-byte atom header. The payload_size calculation (size - AP4_ATOM_HEADER_SIZE) wraps to a large unsigned value without validation, leading to oversized buffer allocation and out-of-bounds memory operations. This causes application termination via SIGILL, resulting in denial of service; no memory disclosure or code execution is achieved through this path.
Affected products
- Axiomatic Systems Bento4 1.6.0.0
Timeline
- 2026-09-24: disclosed: CVE-2026-88376 published