Buffer overflow in Assimp
CVE-2026-10231
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.001 (1.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
- Assimp — versions 6.0.0, 6.0.1, 6.0.2
Weakness classification (CWE)
References
- vuldb.com/vuln/367510 (technical-description, vdb-entry)
- vuldb.com/vuln/367510/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-10231 (third-party-advisory)
- vuldb.com/submit/821191 (third-party-advisory)
- github.com/assimp/assimp/issues/6616 (issue-tracking)
- github.com/user-attachments/files/27195744/poc.zip (exploit)
- github.com/assimp/assimp/ (product)
Frequently asked questions
- What is CVE-2026-10231?
- CVE-2026-10231 is a medium-severity vulnerability in Assimp, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. CVSS score: 5.3/10. Published 2026-06-01.
- How severe is CVE-2026-10231?
- Medium severity. CVSS v3 base score is 5.3 out of 10.