Buffer overflow in Open Asset Import Library Assimp
CVE-2026-19970
A vulnerability was detected in Open Asset Import Library Assimp 17c12da. This affects the function Assimp::MDLImporter::AddBonesToNodeGraph_3DGS_MDL7 of the file code/AssetLib/MDL/MDLLoader.cpp of the component Node Parser. The manipulation of the argument bones_num results in heap-based buffer overflow. The attack can be executed remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
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 (37.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 37th percentile — 37.0% 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: +0.001
Affected products
- Open Asset Import Library Assimp — versions 17c12da
Weakness classification (CWE)
References
- vuldb.com/vuln/391147 (technical-description, vdb-entry)
- vuldb.com/vuln/391147/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-19970 (third-party-advisory)
- vuldb.com/submit/873131 (third-party-advisory)
- github.com/assimp/assimp/issues/6632 (issue-tracking)
- github.com/user-attachments/files/27428677/poc.zip (exploit)
Frequently asked questions
- What is CVE-2026-19970?
- CVE-2026-19970 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-2026-19970?
- Medium severity. CVSS v3 base score is 6.3 out of 10.