CVE-2026-61459
CriticalCVSS 9.8Exploitation Probability (EPSS)
Low risk34th percentile - higher than 34% of all known CVEs
Summary
MCP Server Kubernetes before version 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.
Risk Assessment
The risk for the organization includes leakage of the Kubernetes operator's bearer token to an external API server, which can lead to full cluster compromise and breach of data confidentiality and integrity.
Recommendation
It is recommended to immediately upgrade MCP Server Kubernetes to version 3.9.0 or later, which fixes this vulnerability.
Other vulnerabilities in MCP Server Kubernetes
See all- CVE-2026-47250Medium
mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management. Prior to version 3.7.0, the kubectl_generic tool passes user-supplied flags directly to kubectl without any allowlist, enabling a privilege escalation attack within Kubernetes environments.
- CVE-2026-46519High
mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management. Prior to version 3.6.0, this server exposes three environment variables intended for access control to Kubernetes operations, but these controls were only effective at the tool discovery layer, not at the execution layer.
Original NVD description (English source)
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.