Heap-based Buffer Overflow Vulnerability in Axiomatic Bento4 DSI v1 Parser Component
CVE-2026-5236

4.8MEDIUM

Key Information:

Vendor

Axiomatic

Status
Bento4
Vendor
CVE Published:
31 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-5236?

A vulnerability exists in Axiomatic Bento4, specifically within the DSI v1 Parser's AP4_BitReader::SkipBits function in the Ap4Dac4Atom.cpp file. This flaw can be exploited through a local attack by manipulating the n_presentations argument, leading to a heap-based buffer overflow. The exploit is publicly accessible and poses significant risks. Despite early notification to the project regarding the issue through an issue report, there has been no response or fix from the vendor.

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Affected Version(s)

Bento4 1.6.0-641

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-5236 - Proof of Concept

References

https://vuldb.com/vuln/354387
vdb-entrytechnical-description
https://vuldb.com/vuln/354387/cti
signaturepermissions-required
https://vuldb.com/submit/780473
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

breakingbad (VulDB User)
JSON
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