High severity · published Oct 29, 2026
CVE-2026-9535
A out-of-bounds read vulnerability exists in the vtkChacoReader InputGraph2 functionality of vtk (version(s): 9.6.1)
New
8.2
CVSS
–
EPSS
No
On KEV
Description
A out-of-bounds read vulnerability exists in the vtkChacoReader InputGraph2 functionality of vtk (version(s): 9.6.1). A specially crafted chaco can lead to an out-of-bounds read. An attacker can provide a malicious file to trigger this vulnerability.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VT
vtk · vtk
9.6.1 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-9535
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-9535
talosintelligence.com
https://talosintelligence.com/vulnerability_reports/TALOS-2026-2423
vtk.org
https://vtk.org/download/
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