---
id: CVE-2025-2592
aliases:
  - PYSEC-2025-260
title: >-
  A vulnerability, which was classified as critical, has been found in Open
  Asset Import Library Assimp 5.4.3. This issue affects the funct…
summary: >-
  A vulnerability, which was classified as critical, has been found in Open
  Asset Import Library Assimp 5.4.3. This issue affects the function
  CSMImporter::InternReadFile of the file code/AssetLib/CSM/CSMLoader.cpp. The
  manipulation leads …
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: '2025-03-21'
updated: '2026-07-13'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/PYSEC-2025-260'
references:
  - url: 'https://vuldb.com/?id.300575'
  - url: 'https://vuldb.com/?submit.517782'
  - url: 'https://github.com/assimp/assimp/issues/6010'
  - url: 'https://github.com/assimp/assimp/issues/6010#issue-2877368110'
  - url: 'https://vuldb.com/?ctiid.300575'
  - url: >-
      https://github.com/assimp/assimp/commit/2690e354da0c681db000cfd892a55226788f2743
  - url: 'https://github.com/assimp/assimp/pull/6052'
tags:
  - osv
  - pip
epss: 0.00727
epssPercentile: 0.52109
ingestedAt: '2026-07-13T18:58:06.813Z'
---

## Overview

A vulnerability, which was classified as critical, has been found in Open Asset Import Library Assimp 5.4.3. This issue affects the function CSMImporter::InternReadFile of the file code/AssetLib/CSM/CSMLoader.cpp. The manipulation leads to heap-based buffer overflow. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The patch is named 2690e354da0c681db000cfd892a55226788f2743. 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.