# CVE-2026-14610: Open Asset Import Library Assimp heap overflow in CSM File Handler

Source: https://junglewise.ai/threats/cve-2026-14610-open-asset-import-library-assimp-heap-overflow-in-csm-file  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-03. Updated: 2026-07-03  
License: CC BY 4.0 with a link back

CVE-2026-14610 · Severity: medium · CVSS 5.3 · Published 2026-07-03

A vulnerability exists in the Open Asset Import Library (Assimp), a widely used tool for importing various 3D model formats into applications. When processing specially crafted Character Studio Motion (CSM) files, the library may experience a memory error that can lead to an application crash or allow an attacker to execute unauthorized code. This issue primarily affects systems where an attacker can provide a malicious file for the software to process locally.

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

## Quick answers

**Is CVE-2026-14610 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-14610 being exploited in the wild.

**How severe is CVE-2026-14610?** Medium severity, with a CVSS score of 5.3, published 3 July 2026.

**Which products and versions are affected?** Assimp Asset Import Library up to 6.0.5.

**Is there a fix for CVE-2026-14610?** A patch was published on 2026-06-04: Fix merged into master branch Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-14610 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-14610?** Check whether you run Assimp Asset Import Library 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

A heap-based buffer overflow exists in Assimp up to version 6.0.5 within the `Assimp::CSMImporter::InternReadFile` function in `code/AssetLib/CSM/CSMLoader.cpp`. The vulnerability is triggered when a CSM file defines a `$LastFrame` value that is less than or equal to the `$FirstFrame` value. This results in an insufficient memory allocation for position keys, causing subsequent write operations to exceed the buffer boundaries. An attacker can exploit this locally by providing a malformed CSM file to an application using the library. A patch has been released (commit eb84eec) which implements a check to ensure the frame range is positive before allocation.

## Affected products

- Open Asset Import Library Assimp up to 6.0.5

## Timeline

- 2026-05-12: disclosed: Issue first reported on GitHub
- 2026-06-04: patched: Fix merged into master branch
- 2026-07-03: advisory: CVE published to NVD

## References

- [https://github.com/assimp/assimp/commit/eb84eec580d3f4ba2f0fd87409b7d0744620f11e](https://github.com/assimp/assimp/commit/eb84eec580d3f4ba2f0fd87409b7d0744620f11e)
- [https://github.com/assimp/assimp/issues/6622](https://github.com/assimp/assimp/issues/6622)
- [https://github.com/assimp/assimp/pull/6649](https://github.com/assimp/assimp/pull/6649)
- [https://github.com/user-attachments/files/27235863/poc.zip](https://github.com/user-attachments/files/27235863/poc.zip)
- [https://vuldb.com/cve/CVE-2026-14610](https://vuldb.com/cve/CVE-2026-14610)
- [https://vuldb.com/submit/844646](https://vuldb.com/submit/844646)
- [https://vuldb.com/vuln/376118](https://vuldb.com/vuln/376118)

## Related threats

- [Open Asset Import Library Assimp heap overflow in SceneCombiner::Copy](https://junglewise.ai/threats/cve-2025-15666-open-asset-import-library-assimp-heap-overflow-in-scenecombiner)