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Back to active CVEs
Critical · CVSS 9.3CVE-2026-61459GHSA-WMG3-H8MF-WGVR

MCP Server Kubernetes < 3.9.0 Argument Injection via kubectl Structured ToolsCVE-2026-61459

Answer in brief

CVE-2026-61459 records a Critical severity (CVSS 9.3) vulnerability in MCP Server Kubernetes < 3.9.0 Argument Injection via kubectl Structured Tools. The current sources do not mark it as known exploited. The current feed maps Flux159/mcp-server-kubernetes (generic), mcp-server-kubernetes (npm), mcp-server-kubernetes (npm), mcp-server-kubernetes (pip) and additional mapped packages. Check affected ranges and fixed versions before updating.

Analysis pending evidence review

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

Published Jul 10, 2026Updated Nov 8, 2026Source checked Nov 8, 2026First seen by HOL Jul 10, 2026Material review Nov 8, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.3
Exploitation
Not marked as known exploited
Affected software
6 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 9.3. 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 Flux159/mcp-server-kubernetes (generic), mcp-server-kubernetes (npm), mcp-server-kubernetes (npm), mcp-server-kubernetes (pip) and additional mapped packages. Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:a:suyogs:mcp-server-kubernetes:*:*:*:*:*:node.js:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Flux159/mcp-server-kubernetesgeneric>=0 <3.9.03.9.0
mcp-server-kubernetesnpm<3.9.03.9.0
mcp-server-kubernetesnpm>=0 <3.9.03.9.0
mcp-server-kubernetespip<3.9.03.9.0
mcp-server-kubernetespypi>=0 <3.9.03.9.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Flux159/mcp-server-kubernetes, mcp-server-kubernetes, mcp-server-kubernetes.
  2. 2Review the reported fix. Update Flux159/mcp-server-kubernetes to 3.9.0; mcp-server-kubernetes to 3.9.0; mcp-server-kubernetes to 3.9.0; mcp-server-kubernetes to 3.9.0; mcp-server-kubernetes to 3.9.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Jul 10, 2026

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

  2. Source modified

    Nov 8, 2026

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

  3. First seen by HOL

    Jul 10, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
  • GitHub security advisorygithub.com
  • NVD vulnerability recordnvd.nist.gov
  • GitHub security advisorygithub.com
  • Source referencepypi.org
Upstream source description

MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectl_get, kubectl_describe, kubectl_delete) that allows attackers to bypass the assertNoDangerousFlags security check by supplying resourceType and name parameters with leading dashes. Attackers can inject the --server flag to redirect kubectl commands to an attacker-controlled API server, causing the operator's bearer token to be transmitted externally and enabling full cluster compromise.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Tool Poisoning
EPSS
Not reported
CWE IDs
CWE-88
Source
CVE List V5
Source checked
Nov 8, 2026
References
9 linked sources
Open source record