CVE-2026-47250— mcp-server-kubernetes: kubectl-generic flag injection enables Kubernetes bearer token exfiltration

mcp-server-kubernetes: kubectl-generic flag injection enables Kubernetes bearer token exfiltration

mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management. Prior to version 3.7.0, the kubectl_generic tool in mcp-server-kubernetes passes user-supplied flags directly to kubectl without any allowlist, enabling a privilege escalation attack within Kubernetes environments. An attacker who already has limited cluster or codebase access, for example, a developer with pod-deployment permissions but not cluster-admin credentials, can plant a single structured JSON line in an application's log output. When an operator with a privileged kubeconfig uses the MCP server to read those logs and their AI agent follows the injected instruction, kubectl_generic is called with --server=https://attacker.example.com and --insecure-skip-tls-verify=true. kubectl sends all API requests, including the Authorization: Bearer <token> header from the operator's kubeconfig to the attacker's endpoint. The captured token can then be replayed directly against the real Kubernetes API server, granting the attacker the full RBAC permissions of the operator's service account. This issue has been patched in version 3.7.0.

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

参数注入或修改

MCP Server Kubernetes 参数注入漏洞

MCP Server Kubernetes是Suyog Sonwalkar个人开发者的一个用于kubernetes管理的MCP服务器。 MCP Server Kubernetes 3.7.0之前版本存在参数注入漏洞，该漏洞源于kubectl_generic工具未对用户提供的标志进行白名单检查，可能导致权限提升攻击，攻击者通过注入指令使kubectl将API请求发送到攻击者端点，捕获操作员凭据。

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