Stack-based Buffer Overflow in GPAC MP4Box Component
CVE-2026-4185

5.3MEDIUM

Key Information:

Vendor

GPAC

Status
Gpac
Vendor
CVE Published:
15 March 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-4185?

A stack-based buffer overflow vulnerability exists in the GPAC MP4Box component, specifically within the swf_def_bits_jpeg function in src/scene_manager/swf_parse.c. The issue arises from improper handling of the szName argument, which could enable an attacker to execute arbitrary code remotely. The exploit has been publicly disclosed, making it vital for users to apply the recommended patch, identified as 8961c74f87ae3fe2d3352e622f7730ca96d50cf1, to mitigate the risks associated with this vulnerability.

Affected Version(s)

GPAC 2.5-DEV-rev2167-gcc9d617c0-master

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-2026-4185 - Proof of Concept

References

https://vuldb.com/?id.351091
vdb-entrytechnical-description
https://vuldb.com/?ctiid.351091
signaturepermissions-required
https://vuldb.com/?submit.769840
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
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

peterx (VulDB User)
.