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GPAC MP4Box CVE-2026-90683

| EUVDEUVD-2026-77199 LOW
Reachable Assertion (CWE-617)
2026-09-14 VulDB GHSA-vcmh-wc7m-59v8
Denial Of Service Gpac N A
1.9
CVSS 4.0 · Vendor: VulDB

Severity by source

Vendor (VulDB) PRIMARY
1.9 MEDIUM
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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
3.3 LOW

Local-only vector confirmed by description; PR:L because running MP4Box requires a local user session; no confidentiality or integrity impact.

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

Primary rating from Vendor (VulDB).

CVSS VectorVendor: VulDB

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
X

Lifecycle Timeline

5
Severity Changed
Sep 14, 2026 - 05:22 NVD
MEDIUM LOW
CVSS changed
Sep 14, 2026 - 05:22 NVD
4.8 (MEDIUM) 1.9 (LOW)
Source Code Evidence Fetched
Sep 14, 2026 - 05:16 vuln.today
Analysis Generated
Sep 14, 2026 - 05:16 vuln.today
CVE Published
Sep 14, 2026 - 04:45 cve.org
MEDIUM 4.8

DescriptionCVE.org

A vulnerability was detected in GPAC up to f1219cde. Affected is the function gf_node_unregister of the file scenegraph/base_scenegraph.c of the component MP4Box. Performing a manipulation results in reachable assertion. Attacking locally is a requirement. The exploit is now public and may be used. Upgrading to version abi-16.23 is able to address this issue. The patch is named 49dee5cad329cfed310c1682703df7daa47df31a. It is advisable to upgrade the affected component. This is not a duplicate of CVE-2021-46237 or CVE-2021-46234.

AnalysisAI

Reachable assertion in GPAC MP4Box's scenegraph node unregistration function allows a local attacker to crash the application by supplying a crafted MP4 file. The vulnerability exists in gf_node_unregister() within scenegraph/base_scenegraph.c, where a hard gf_assert(pNode->sgprivate->num_instances) fires when processing scene graph structures with zero instance counts - a state reachable through malformed MPEG-4 BIFS scene data. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires local execution of MP4Box with a crafted MP4 input file as an argument (AV:L, PR:L per CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment Real-world risk is low. … 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`, which contains the fix introduced by commit `49dee5cad329cfed310c1682703df7daa47df31a` (https://github.com/gpac/gpac/commit/49dee5cad329cfed310c1682703df7daa47df31a). … Detailed patch versions, workarounds, and compensating controls in full report.
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CVE-2026-90683 vulnerability details – vuln.today
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