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Advisory record · GHSA-wmg3-h8mf-wgvr

mcp-server-kubernetes argument injection can expose Kubernetes cluster credentials

CVSS 9.3 CriticalCriticalEPSS 0.024 · 84th percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 10 Jul 2026, 21:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
mcp-server-kubernetesnpm<3.9.03.9.0
Identifiers
GHSA-wmg3-h8mf-wgvr · CVE-2026-61459 · PYSEC-2026-3685
Weakness (CWE)
CWE-88
Tags
Published
10 Jul 2026
Updated
28 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

mcp-server-kubernetes versions before 3.9.0 are affected by an argument injection flaw in its structured tools kubectl_get, kubectl_describe, and kubectl_delete. The source says that supplying resourceType or name values with leading dashes bypasses the assertNoDangerousFlags check, which lets an attacker add a --server flag that points kubectl at an attacker-controlled API server. This could expose the operator's bearer token and lead to full cluster compromise; the source does not state what access the attacker must already have. Upgrade to mcp-server-kubernetes 3.9.0 or later.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.3 Critical 4.0 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CNA (VulnCheck)
  • CISA KEV Not listed.
  • EPSS 0.024, the 84th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 10 Jul 2026, 18:34 UTC Confirmed by the CVE List
  2. 31 Oct 2026, 13:33 UTC First seen by agentprime
  3. 31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.