# CVE-2026-36907: Axiomatic-systems Bento4 stack overflow in AP4_StsdAtom

Source: https://junglewise.ai/threats/cve-2026-36907-axiomatic-systems-bento4-stack-overflow-in-ap4-stsdatom  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-06-26. Updated: 2026-06-26  
License: CC BY 4.0 with a link back

CVE-2026-36907 · Severity: info · CVSS 5.5 · Published 2026-06-26

Bento4 is a C++ library and toolset used for processing MP4 and other multimedia files. A vulnerability in how it handles specific media metadata (atoms) allows an attacker to crash applications using the library by providing a specially crafted MP4 file. This could lead to a denial-of-service condition for users opening malicious media content.

Technologies: [Axiomatic Systems Bento4](https://junglewise.ai/threats/technologies/bento4). Vendors: [Axiomatic Systems](https://junglewise.ai/threats/vendors/axiomatic-systems).

## Quick answers

**Is CVE-2026-36907 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-36907 being exploited in the wild.

**How severe is CVE-2026-36907?** Informational severity, with a CVSS score of 5.5, published 26 June 2026.

**Which products and versions are affected?** Axiomatic Systems Bento4 before v1.8.9.

**Is there a fix for CVE-2026-36907?** 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-2026-36907 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-36907?** 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

A stack overflow vulnerability exists in the Bento4 library within the AP4_StsdAtom::AP4_StsdAtom component. The issue is triggered during the parsing of Sample Description (stsd) atoms in MP4 files. An attacker can exploit this by providing a malformed MP4 file that causes excessive recursion or improper memory allocation during atom factory processing, leading to a crash (Denial of Service). The vulnerability is reachable via local file execution or any application that utilizes Bento4 to parse untrusted media streams. The issue is addressed in version 1.8.9.

## Affected products

- axiomatic-systems Bento4 before v1.8.9

## Timeline

- 2026-06-26: disclosed
- 2026-06-26: advisory

## References

- [https://github.com/Aleksoid1978/MPC-BE/issues/1005](https://github.com/Aleksoid1978/MPC-BE/issues/1005)
- [https://github.com/axiomatic-systems/Bento4/issues/614](https://github.com/axiomatic-systems/Bento4/issues/614)

## Related threats

- [Bento4 integer underflow in MP4 atom parsing](https://junglewise.ai/threats/cve-2026-88377-bento4-1-6-0-0-contains-an-integer-underflow-vulnerability-in-the)
- [Bento4 integer underflow in avcC/hvcC atom parsing](https://junglewise.ai/threats/cve-2026-88376-bento4-1-6-0-0-contains-an-integer-underflow-vulnerability-in-ap4)
- [axiomatic-systems Bento4 stack overflow in AP4_TrunAtom](https://junglewise.ai/threats/cve-2026-36908-axiomatic-systems-bento4-stack-overflow-in-ap4-trunatom)