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  4. CVE 2026 118589 nschloe meshio vtk reader vtk42py memory
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Back to active CVEs
Medium · CVSS 6.9CVE-2026-118589

nschloe meshio VTK Reader _vtk_42.py memory allocationCVE-2026-118589

Answer in brief

CVE-2026-118589 records a Medium severity (CVSS 6.9) vulnerability in nschloe meshio VTK Reader _vtk_42.py memory allocation. The current sources do not mark it as known exploited. The current feed maps nschloe/meshio (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 28, 2026Updated Oct 28, 2026Source checked Oct 29, 2026First seen by HOL Oct 28, 2026Material review Oct 28, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps nschloe/meshio (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
nschloe/meshiogeneric5.3.0 || 5.3.1 || 5.3.2 || 5.3.3 || 5.3.4 || 5.3.5Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for nschloe/meshio.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 28, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 28, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
  • Source referencevuldb.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • nipy nibabel Header volumeutils.py array_from_file memory allocationAlso CWE-789
  • decode-uri-component: Denial of service via quadratic replacement of percent-encoded runsAlso CWE-400

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-789, CWE-400
Source
CVE List V5
Source checked
Oct 29, 2026
References
6 linked sources
Open source record