Buffer overflow in Open Asset Import Library Assimp
CVE-2026-19999
A security vulnerability has been detected in Open Asset Import Library Assimp Assimp 17c12da. The affected element is the function Assimp::MDLImporter::ParseBoneTrafoKeys_3DGS_MDL7 of the file code/AssetLib/MDL/MDLLoader.cpp of the component 3DGS MDL7 Bone Transformation Key Parser. The manipulation of the argument transmatrix_count/pcBoneTransforms leads to buffer overflow. It is possible to initiate the attack remotely. The exploit has been disclosed publicly and may be used. The identifier of the patch is 50d767984e78d51b53e2020fdf0967fd624bc377. It is recommended to apply a patch to fix this issue.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.005 (38.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 38.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002
Affected products
- Open Asset Import Library Assimp — versions 17c12da
Weakness classification (CWE)
References
- vuldb.com/vuln/391200 (technical-description, vdb-entry)
- vuldb.com/vuln/391200/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-19999 (third-party-advisory)
- vuldb.com/submit/873132 (third-party-advisory)
- github.com/assimp/assimp/issues/6633 (issue-tracking)
- github.com/assimp/assimp/pull/6759 (issue-tracking, patch)
- github.com/user-attachments/files/27429337/poc.zip (exploit)
- github.com/assimp/assimp/commit/50d767984e78d51b53e2020fdf0967fd624bc377 (patch)
Frequently asked questions
- What is CVE-2026-19999?
- CVE-2026-19999 is a medium-severity vulnerability in Open Asset Import Library Assimp, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 6.3/10. Published 2026-08-17.
- How severe is CVE-2026-19999?
- Medium severity. CVSS v3 base score is 6.3 out of 10.