Use After Free Vulnerability in GPAC MP4Box
CVE-2026-90791

5.3MEDIUM

Key Information:

Vendor

GPAC

Status
Gpac
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90791?

A vulnerability exists in GPAC's MP4Box component that affects the gf_node_unregister function within the scenegraph/base_scenegraph.c file. This vulnerability allows for a 'use after free' condition, which could be exploited remotely. With the exploit now publicly available, it is crucial for users to upgrade to version abi-16.23 to mitigate potential risks. The issue was resolved with a patch identified as 9eb40df4448b88d6a6ce3454657c06f47eff0b24, and upgrading the affected version is strongly recommended to ensure security.

Affected Version(s)

GPAC f1219cde

GPAC abi-16.23

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-2026-90791 - Proof of Concept

References

https://vuldb.com/vuln/403297
vdb-entrytechnical-description
https://vuldb.com/vuln/403297/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90791
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:
Unknown

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Ech06 (VulDB User)
.