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GPAC MP4Box EUVDEUVD-2026-77538

| CVE-2026-90791 LOW
Use After Free (CWE-416)
2026-09-14 VulDB GHSA-6x7f-5vmr-66vm
Denial Of Service Use After Free Memory Corruption Gpac N A
2.1
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
2.1 MEDIUM
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
6.3 MEDIUM

File must be actively opened (UI:R); all impacts confined to the GPAC process with no scope change; UAF most likely causes DoS with limited, low-severity memory exposure.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
P
Scope
X

Lifecycle Timeline

5
Source Code Evidence Fetched
Sep 15, 2026 - 08:15 vuln.today
Analysis Generated
Sep 15, 2026 - 08:15 vuln.today
Severity Changed
Sep 14, 2026 - 15:22 NVD
MEDIUM LOW
CVSS changed
Sep 14, 2026 - 15:22 NVD
5.3 (MEDIUM) 2.1 (LOW)
CVE Published
Sep 14, 2026 - 14:45 cve.org
LOW 2.1

DescriptionCVE.org

A vulnerability was detected in GPAC up to f1219cde. This vulnerability affects the function gf_node_unregister of the file scenegraph/base_scenegraph.c of the component MP4Box. The manipulation results in use after free. The attack can be executed remotely. The exploit is now public and may be used. Upgrading to version abi-16.23 is able to resolve this issue. The patch is identified as 9eb40df4448b88d6a6ce3454657c06f47eff0b24. Upgrading the affected component is recommended.

AnalysisAI

Use-after-free in GPAC's gf_node_unregister function (scenegraph/base_scenegraph.c) allows an attacker to cause a crash or limited memory corruption by supplying a crafted MP4, BT, or XMT scene file. The vulnerability arises from improper cleanup ordering of proto field default node values during scene graph teardown, with additional related issues in the BT and XMT scene loaders. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation The target must open or process a specially crafted media file (MP4, BT, XMT, or LASeR scene format) using MP4Box or an application embedding the GPAC library. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 vector (AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/E:P, score 2.1) paints a nuanced picture: while the attack is network-reachable and no privileges are required, all confidentiality, integrity, and availability impacts are rated Low with no scope change, placing this firmly in crash/DoS territory rather than reliable code execution. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade GPAC to release abi-16.23 or any commit at or after 9eb40df4448b88d6a6ce3454657c06f47eff0b24. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-77538 vulnerability details – vuln.today
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