CVE-2026-10231: Assimp Half-Life 1 MDL Loader HL1MDLLoader.cpp extract_anim_value heap-based overflow

Severity: medium (CVSS 5.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-01 · updated 2026-07-22
Weakness: CWE-119

Description

A security flaw has been discovered in Assimp up to 6.0.4. Affected is the function HL1MDLLoader::extract_anim_value of the file HL1MDLLoader.cpp of the component Half-Life 1 MDL Loader. Performing a manipulation of the argument num.total results in heap-based buffer overflow. The attack must be initiated from a local position. The exploit has been released to the public and may be used for attacks. The project tagged the reported issue as bug.

Affected products

Assimp: 6.0.0, 6.0.1, 6.0.2, 6.0.3, 6.0.4

References

https://github.com/assimp/assimp/
https://github.com/assimp/assimp/issues/6616
https://github.com/user-attachments/files/27195744/poc.zip
https://vuldb.com/cve/CVE-2026-10231
https://vuldb.com/submit/821191
https://vuldb.com/vuln/367510
https://vuldb.com/vuln/367510/cti

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