CVE-2026-5236 MEDIUM

CVE-2026-5236: Axiomatic Bento4 DSI v1 Ap4Dac4Atom.cpp SkipBits heap-based overflow

Vendor Axiomatic
Product Bento4
Weakness CWE-122
Published March 31, 2026
Last update April 3, 2026

CVSS base score

4.8/10
Attack vector Local
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality
Integrity

CVSS vector

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 31, 2026 CVE published
April 3, 2026 Record updated