# CVE-2025-57107: PYSEC-2025-225 - Kitware VTK (Visualization Toolkit) through 9.5.0 contains a heap buffer overflow vulnerability in…

Source: https://junglewise.ai/threats/cve-2025-57107-pysec-2025-225-kitware-vtk-visualization-toolkit-through-9-5-0  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2025-10-31  
License: CC BY 4.0 with a link back

CVE-2025-57107 · Severity: low · CVSS 3.1 · Published 2025-10-31

Kitware VTK (Visualization Toolkit) through 9.5.0 contains a heap buffer overflow vulnerability in vtkGLTFDocumentLoader. When processing specially crafted GLTF files, the copy constructor of Accessor objects fails to properly validate buffer boundaries before performing memory read operations.

Technologies: [vtk (PyPI)](https://junglewise.ai/threats/technologies/vtk). Vendors: [PyPI](https://junglewise.ai/threats/vendors/pypi).

## Quick answers

**Is CVE-2025-57107 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2025-57107 being exploited in the wild.

**How severe is CVE-2025-57107?** Low severity, with a CVSS score of 3.1, published 31 October 2025.

**Which products and versions are affected?** vtk (PyPI) ECOSYSTEM:introduced=0,fixed=9.5.1.

**Is there a fix for CVE-2025-57107?** Yes. vtk (PyPI): upgrade to 9.5.1 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**Am I affected by CVE-2025-57107?** Check whether you run vtk (PyPI) 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.

## How to fix

- vtk (PyPI): upgrade to 9.5.1 or later

  ```sh
  pip install "vtk>=9.5.1"
  ```


## Affected products

- vtk (PyPI) ECOSYSTEM:introduced=0,fixed=9.5.1

## Identifiers

- CVE-2025-57107
- PYSEC-2025-225

## Related threats

- [PYSEC-2025-226 - Kitware VTK (Visualization Toolkit) through 9.5.0 contains a heap use-after-free vulnerability in…](https://junglewise.ai/threats/cve-2025-57108-pysec-2025-226-kitware-vtk-visualization-toolkit-through-9-5-0)
- [PYSEC-2025-224 - Kitware VTK (Visualization Toolkit) up to 9.5.0 is vulnerable to Buffer Overflow in…](https://junglewise.ai/threats/cve-2025-57106-pysec-2025-224-kitware-vtk-visualization-toolkit-up-to-9-5-0-is)
- [VTK NULL pointer dereference vulnerability](https://junglewise.ai/threats/cve-2021-42521-vtk-null-pointer-dereference-vulnerability)