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CVE-2026-61459 — Vulnerability in mcp-server-kubernetes — CVE Details

CRITICAL

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

Published July 10, 2026Updated August 19, 2026Source: osv

Summary

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.

Advisory Timeline

  • First published July 10, 2026 (94 days ago).
  • Last revised August 19, 2026 — 40 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

pip
Update mcp-server-kubernetes to 3.9.0 or later
pip install "mcp-server-kubernetes>=3.9.0"

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (1)

Affects 1 ecosystem: pypi (1).

PackageEcosystemAffectedFixed In
mcp-server-kubernetes
pypi
0.1.0, 0.1.1, 0.1.2, 0.1.3 (+1 more)3.9.0

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.8 score means for each attack dimension.

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

References

Frequently Asked Questions

What is CVE-2026-61459?
mcp-server-kubernetes argument injection can expose Kubernetes cluster credentials This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.8/10).
How do I check if my project is affected by CVE-2026-61459?
CVE-2026-61459 affects mcp-server-kubernetes. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-61459 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score
9.8

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-wmg3-h8mf-wgvr
PYSEC-2026-3685

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