Is CVE-2026-118589 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-118589?

CVE-2026-118589 has a CVSS v3 severity of MEDIUM (5.3).

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CVE-2026-118589

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.