Kitware VTK (Visualization Toolkit) through 9.5.0 contains a heap buffer overflow vulnerability in vtkGLTFDocumentLoader.

published 2025-10-31 12 mo ago modified 2026-11-05 4 d ago also PYSEC-2025-225 , EUVD-2025-37361

cvss: 7.1; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 7%
public exploits: 0; none known

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.

Patch / fix

fixed in 1 distros 1

pypi vtk 9.5.1

vtk9 Debian 14 9.6.2+ds-1

debian advisories DEBIAN-CVE-2025-57107

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-57107 updated 2026-06-28 cvss 7.1

Kitware VTK: vtk: Kitware VTK (Visualization Toolkit) contains a heap buffer overflow vulnerability in vtkGLTFDocumentLoader

Red Hat All currently supported Red Hat products
not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 12 mo ago (2025-10-31)

Exploit prediction

0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

gitlab.kitware.com https://gitlab.kitware.com/vtk/vtk/-/issues/19732 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	7.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
CNA	3.1	7.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
OSV	3.1	7.1	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H

Affected packages

ecosystem	package	affected	fixed in
pypi	vtk	<9.5.1	9.5.1

Classification

Weakness

CWE-122 Heap-based Buffer Overflow

References

gitlab.kitware.com /vtk/vtk/-/issues/19732
exploit, issue-tracking, third-party-advisory, report

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary