CVE-2026-118589— nschloe meshio VTK Reader _vtk_42.py memory allocation

Quick assessment

Affected

nschloe meshio

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 nschloe 的 meshio 项目（版本 5.3.5 及以下）中发现了一个安全弱点。该问题影响的是 VTK 读取器组件中文件内的某个未知函数。攻击者可通过操纵参数，触发不受控的内存分配。该攻击可远程执行。项目方已通过问题报告提前获知此漏洞，但截至目前尚未作出回应。

CVSS 5.3 · Medium Updated Oct 29, 2026

Possible ATT&CK Techniques 2 AI

T1069.006 T1190 · Exploit Public-Facing Application

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Vulnerability Information

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Vulnerability Title

nschloe meshio VTK Reader _vtk_42.py memory allocation

Source: CVE Program / CVE List V5

Vulnerability Description

A weakness has been identified in nschloe meshio up to 5.3.5. Impacted is an unknown function of the file meshio/_vtk_42.py of the component VTK Reader. Executing a manipulation of the argument DIMENSIONS can lead to uncontrolled memory allocation. The attack can be executed remotely. The project was informed of the problem early through an issue report but has not responded yet.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Source: CVE Program / CVE List V5

Vulnerability Type

未经控制的内存分配

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
nschloe	meshio	5.3.0	`cpe:2.3:a:nschloe:meshio::::::::`

II. Public POCs for CVE-2026-118589

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-118589

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Other References for CVE-2026-118589 (6)

https://github.com/nschloe/meshio/ product
https://github.com/nschloe/meshio/issues/1576 issue-tracking
https://vuldb.com/cve/CVE-2026-118589 third-party-advisory
https://vuldb.com/vuln/428027/cti signature permissions-required
https://vuldb.com/vuln/428027 vdb-entry technical-description
https://vuldb.com/submit/1026207 third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-118589

IV. Related Vulnerabilities

Same weakness: CWE-789