Use After Free Vulnerability in GPAC MP4Box Affects Localized Operations
CVE-2026-90827

4.8MEDIUM

Key Information:

Vendor

GPAC

Status
Gpac
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90827?

A vulnerability arises in GPAC's MP4Box version 26.07.0 due to a flaw in the gf_node_deactivate_ex function within the base_scenegraph.c file. This flaw could allow an attacker to exploit a use after free condition, enabling local manipulation of memory that could compromise system stability or security. Public exploit code is available for this vulnerability, emphasizing the urgency for users to upgrade to version abi-16.23, which includes a crucial patch identified by commit 49dee5cad329cfed310c1682703df7daa47df31a. Immediate action is recommended to mitigate potential risks.

Affected Version(s)

GPAC 26.07.0

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-2026-90827 - Proof of Concept

References

https://vuldb.com/vuln/403329
vdb-entrytechnical-description
https://vuldb.com/vuln/403329/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90827
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
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

fczhang (VulDB User)
.