Buffer overflow in Axiomatic Bento4
CVE-2026-5236
A vulnerability was identified in Axiomatic Bento4 up to 1.6.0-641. Affected is the function AP4_BitReader::SkipBits of the file Ap4Dac4Atom.cpp of the component DSI v1 Parser. Such manipulation of the argument n_presentations leads to heap-based buffer overflow. The attack needs to be performed locally. The exploit is publicly available and might be used. The project was informed of the problem early through an issue report but has not responded yet.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.002 (5.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 6th percentile — 5.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Axiomatic Bento4 — versions 1.6.0-641
Weakness classification (CWE)
References
- vuldb.com/vuln/354387 (technical-description, vdb-entry)
- vuldb.com/vuln/354387/cti (signature, permissions-required)
- vuldb.com/submit/780473 (third-party-advisory)
- github.com/axiomatic-systems/Bento4/issues/1059 (issue-tracking)
- github.com/axiomatic-systems/Bento4/issues/1059 (issue-tracking, exploit)
Frequently asked questions
- What is CVE-2026-5236?
- CVE-2026-5236 is a medium-severity vulnerability in Axiomatic Bento4, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-03-31.
- How severe is CVE-2026-5236?
- Medium severity. CVSS v3 base score is 5.3 out of 10.