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Advisories

MCP Server Kubernetes < 3.9.0 Argument Injection via kubectl Structured Tools

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severity
critical
date
Affecting

  • mcp-server-kubernetes < 3.9.0

CWE
  • CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
CVSS
9.3
CVSS V4 Vector
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
Credit
George Chen
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.

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