---
id: CVE-2025-3015
aliases:
  - PYSEC-2025-261
title: >-
  A vulnerability classified as critical has been found in Open Asset Import
  Library Assimp 5.4.3. This affects the function Assimp::ASEImp…
summary: >-
  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 Fi…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
vendor: pyassimp
product: pyassimp
ecosystem: pip
affected:
  - pyassimp <= 5.4.3
published: '2025-03-31'
updated: '2026-07-13'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/PYSEC-2025-261'
references:
  - url: 'https://vuldb.com/?id.302067'
  - url: 'https://vuldb.com/?submit.524589'
  - url: 'https://github.com/assimp/assimp/issues/6021'
  - url: 'https://github.com/assimp/assimp/issues/6021#issue-2877378829'
  - url: 'https://vuldb.com/?ctiid.302067'
  - url: >-
      https://github.com/assimp/assimp/commit/7c705fde418d68cca4e8eff56be01b2617b0d6fe
  - url: 'https://github.com/assimp/assimp/pull/6045'
tags:
  - osv
  - pip
epss: 0.00504
epssPercentile: 0.42153
ingestedAt: '2026-07-13T18:58:06.831Z'
---

## Overview

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.

## Affected packages

- `pyassimp <= 5.4.3`

## Remediation

Refer to the advisory for the patched release.