Is CVE-2026-82591 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-82591 being exploited in the wild.

How severe is CVE-2026-82591?

Medium severity, with a CVSS score of 5.3, published 30 August 2026.

Which products and versions are affected?

Assimp Open Asset Import Library up to 6.0.2.

Is there a fix for CVE-2026-82591?

A patch was published on 2026-08-04: Fix merged in upstream repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-82591 attacked?

It is attacked with local access, in a software library.

Am I affected by CVE-2026-82591?

Check whether you run Assimp Open 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.

CVE-2026-82591: Open Asset Import Library Assimp heap buffer overflow in MD5Importer

CVE-2026-82591 · Severity: medium · CVSS 5.3 · Published 2026-08-30

Assimp is a widely-used library for importing and processing 3D model files across games and design software. A heap buffer overflow in the MD5 file parser allows a local attacker to crash the application or potentially execute code by providing a malicious MD5 model file, impacting any application using the vulnerable library version.

Technologies: Assimp Open Asset Import Library. Vendors: Assimp.

Quick answers

Is CVE-2026-82591 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-82591 being exploited in the wild.
How severe is CVE-2026-82591?: Medium severity, with a CVSS score of 5.3, published 30 August 2026.
Which products and versions are affected?: Assimp Open Asset Import Library up to 6.0.2.
Is there a fix for CVE-2026-82591?: A patch was published on 2026-08-04: Fix merged in upstream repository Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-82591 attacked?: It is attacked with local access, in a software library.
Am I affected by CVE-2026-82591?: Check whether you run Assimp Open 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 the MD5Importer::MakeDataUnique function in code/AssetLib/MD5/MD5Loader.cpp, triggered by improper handling of the iNewIndex argument during memory manipulation. The vulnerability requires local access and a specially crafted MD5 model file to trigger. An attacker can cause a heap buffer overflow write, leading to application crash (denial of service) or potential code execution depending on heap layout. A patch has been identified (commit bf9dabb617c46e5133dac65cca6bff177917afcb) and is available in the upstream repository.

Affected products

Assimp Open Asset Import Library up to 6.0.2

Timeline

2026-08-30: disclosed
2026-08-04: patched: Fix merged in upstream repository

References

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