# CVE-2026-111128: Assimp NULL pointer dereference in Ogre3D importer

Source: https://junglewise.ai/threats/cve-2026-111128-assimp-through-6-0-5-contains-a-null-pointer-dereference  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-15. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-111128 · Severity: medium · CVSS 5.5 · Published 2026-10-15

Assimp is a library that loads and processes 3D model files in applications ranging from games to design tools. A vulnerability in its Ogre3D file format handler allows an attacker to crash applications by supplying specially crafted 3D model files with invalid bone references, causing a denial of service.

Technologies: [Assimp](https://junglewise.ai/threats/technologies/assimp). Vendors: [Assimp](https://junglewise.ai/threats/vendors/assimp).

## Quick answers

**Is CVE-2026-111128 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-111128 being exploited in the wild.

**How severe is CVE-2026-111128?** Medium severity, with a CVSS score of 5.5, published 15 October 2026.

**Which products and versions are affected?** Assimp through 6.0.5.

**Is there a fix for CVE-2026-111128?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-111128 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-111128?** Check whether you run Assimp at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability is a NULL pointer dereference in OgreStructs.cpp where the Ogre3D importer fails to validate bone indices before use. When processing a crafted .mesh or .skeleton file that references a non-existent bone, the BoneById() function returns null but is dereferenced without checking, causing a crash. This requires the attacker to control the input file supplied to the application.

## Affected products

- Assimp Assimp through 6.0.5

## Timeline

- 2026-10-15: disclosed

## References

- [https://github.com/](https://github.com/)
- [https://github.com/assimp/assimp](https://github.com/assimp/assimp)

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- [Assimp MDL importer heap buffer overflow](https://junglewise.ai/threats/cve-2026-19969-assimp-mdl-importer-heap-buffer-overflow)
- [Assimp heap buffer overflow in LWO2 model parser](https://junglewise.ai/threats/cve-2026-19968-assimp-heap-buffer-overflow-in-lwo2-model-parser)
- [Assimp out-of-bounds read in HL1MDLLoader](https://junglewise.ai/threats/cve-2026-10233-assimp-out-of-bounds-read-in-hl1mdlloader)