EUVD-2026-33522
GHSA-x9p9-4cp2-p368
Severity by source
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/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
Primary rating from Vendor (VulDB) · only source for this CVE.
CVSS VectorVendor: VulDB
Lifecycle Timeline
3DescriptionCVE.org
A vulnerability was found in Assimp up to 6.0.4. This affects the function glTFCommon::CopyValue in the library glTFCommon.h of the component 4x4 Matrix Parser. Performing a manipulation results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been made public and could be used. The project tagged the reported issue as bug.
AnalysisAI
Heap-based buffer overflow in Assimp's glTF 4x4 Matrix Parser (versions up to 6.0.4) can be triggered by a local, low-privileged attacker supplying crafted input to the glTFCommon::CopyValue function in glTFCommon.h, resulting in partial confidentiality, integrity, and availability impact. A public proof-of-concept exploit archive has been published on GitHub, confirmed by the CVSS temporal modifier E:P (proof-of-concept). No active exploitation has been confirmed (not in CISA KEV), and the CVSS remediation level RL:X indicates no official patch has been defined as of this analysis.
Technical ContextAI
Assimp (Open Asset Import Library) is a widely embedded C++ library for loading and processing 3D model files across dozens of formats, commonly integrated into game engines, 3D content tools, and simulation software. The affected component is the glTF/glTF2 parser - specifically the glTFCommon::CopyValue templated helper function in glTFCommon.h, which handles deserialization of 4x4 transformation matrices from glTF JSON or binary data. CWE-122 (Heap-based Buffer Overflow) indicates that during this copy operation, insufficient bounds checking allows a write beyond the allocated heap buffer boundary when processing an oversized or malformed matrix value. CPE data (cpe:2.3:a:n/a:assimp:*:*:*:*:*:*:*:*) reflects that NVD has not assigned a formal vendor identifier, consistent with Assimp being a community-maintained open-source project. The * version wildcard in the CPE, combined with the description's upper bound of 6.0.4, defines the affected range as all releases through 6.0.4.
RemediationAI
No vendor-released patch has been identified at time of analysis - the CVSS remediation level is RL:X (not defined), and the GitHub issue (#6612 at https://github.com/assimp/assimp/issues/6612) has not been linked to a tagged release fixing the overflow. Monitor the Assimp GitHub repository at https://github.com/assimp/assimp/ for a patched release and upgrade as soon as one is available. As a compensating control, restrict the ability of unprivileged or untrusted users to supply glTF files to any Assimp-consuming application - for example, validate or sandbox 3D model input before it reaches the parser, or disable glTF format support in builds where it is not required (Assimp supports compile-time format exclusions via CMake flags such as -DASSIMP_BUILD_GLTF_IMPORTER=OFF). Disabling the importer eliminates the attack surface entirely but prevents loading of glTF/GLB files. For server-side pipelines that accept user-uploaded 3D content, process files in isolated containers or low-privilege sandboxes to contain heap corruption impact.
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Buffer Overflow
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External POC / Exploit Code
Leaving vuln.today