VDB-428027 · Submit #1026207 · CVE-2026-118589

nschloe meshio up to 5.3.5 VTK Reader meshio/_vtk_42.py DIMENSIONS memory allocation

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	2.36-

Summaryinfo

A vulnerability was found in nschloe meshio up to 5.3.5. It has been classified as problematic. The affected element is an unknown function of the file meshio/_vtk_42.py of the component VTK Reader. The manipulation of the argument DIMENSIONS leads to memory allocation. This vulnerability is uniquely identified as CVE-2026-118589. The attack is possible to be carried out remotely. No exploit exists. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability was found in nschloe meshio up to 5.3.5 and classified as problematic. This issue affects an unknown code block of the file meshio/_vtk_42.py of the component VTK Reader. The manipulation of the argument DIMENSIONS with an unknown input leads to a memory allocation vulnerability. Using CWE to declare the problem leads to CWE-789. The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated. Impacted is availability.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-118589. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-112559). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

nschloe

Name

meshio

Version

Website

Product: https://github.com/nschloe/meshio/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory allocation
CWE: CWE-789 / CWE-400 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/28/2026 Advisory disclosed
10/28/2026 +0 days VulDB entry created
10/29/2026 +1 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: 1576
Status: Confirmed

CNA: VulDB
CVE: CVE-2026-118589 (🔒)

GCVE (CVE): GCVE-0-2026-118589
GCVE (VulDB): GCVE-100-428027
EUVD: 🔒

Entryinfo

Created: 10/28/2026 17:22
Updated: 10/29/2026 02:27
Changes: 10/28/2026 17:22 (55), 10/29/2026 02:27 (1)
Complete: 🔍
Submitter: Mohammedix88
Cache ID: 216::103

Submitinfo

Accepted

Submit #1026207: nschloe meshio 5.3.5 Uncontrolled Memory Allocation (by github.com)

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.