CVE-2026-10199 in Assimp
Summary
by MITRE • 06/01/2026
A vulnerability has been found in Assimp up to 6.0.4. Affected by this issue is the function glTF2::LazyDict in the library glTF2Asset.h. Such manipulation of the argument operator[] leads to null pointer dereference. The attack must be carried out locally. The exploit has been disclosed to the public and may be used. The name of the patch is d24b85319bd70c65883a2b96613e07e23fb95981. It is best practice to apply a patch to resolve this issue.
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Analysis
by VulDB Data Team • 06/03/2026
The vulnerability identified in Assimp version 6.0.4 and earlier affects the glTF2::LazyDict function within the glTF2Asset.h library component. This issue represents a critical null pointer dereference condition that occurs when the argument operator[] is manipulated during function execution. The flaw exists within the glTF2 asset handling functionality of the library, which is commonly used for importing and exporting 3D graphics files in various applications and game engines. The vulnerability specifically manifests when processing glTF2 formatted files, making it particularly concerning for applications that rely on Assimp for 3D model importation and rendering.
The technical implementation of this vulnerability stems from improper handling of null pointer references within the LazyDict data structure during glTF2 file processing. When the operator[] function is invoked with certain malformed or crafted input parameters, the code fails to properly validate pointer states before dereferencing them, leading to a crash condition that can potentially be exploited. This behavior aligns with CWE-476 which specifically addresses null pointer dereference vulnerabilities. The vulnerability requires local execution privileges for exploitation, meaning an attacker must have access to the system where the vulnerable Assimp library is installed and running. However, the public disclosure of the exploit means that this vulnerability is no longer theoretical and can be actively leveraged by threat actors.
The operational impact of this vulnerability extends beyond simple application crashes, as it can be used to cause denial of service conditions in applications that depend on Assimp for 3D content processing. This includes game engines, 3D modeling applications, and any software that imports glTF2 files for visualization or processing. The vulnerability affects the stability and reliability of these systems, potentially leading to complete application termination or system instability. Given that Assimp is widely used across the software industry in both commercial and open source applications, the potential attack surface is extensive. The vulnerability's classification under ATT&CK technique T1499.004 for network denial of service indicates that it can be leveraged to disrupt legitimate system operations through service availability compromise.
Security practitioners should prioritize patching this vulnerability immediately, with the recommended fix being the application of the patch identified by commit hash d24b85319bd70c65883a2b96613e07e23fb95981. This patch addresses the root cause by implementing proper null pointer validation within the glTF2::LazyDict function before any dereference operations occur. Organizations should conduct thorough vulnerability assessments to identify all systems running affected versions of Assimp and ensure complete patch deployment across their environments. The remediation process should include verification that the patch has been properly applied and that no regression issues have been introduced in the application functionality. Regular security monitoring and vulnerability management processes should be enhanced to detect similar issues in other third-party libraries and dependencies that may be subject to similar null pointer dereference conditions.