CVE-2026-46519
HighCVSS 8.8Exploitation Probability (EPSS)
Low risk19th percentile - higher than 19% of all known CVEs
Summary
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.
Risk Assessment
Any client that knows a tool name can invoke it directly regardless of the configured restriction mode, posing a significant security risk to operations within the Kubernetes cluster.
Recommendation
It is recommended to upgrade to version 3.6.0 or later to mitigate this security vulnerability.
Original NVD description (English source)
mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management. Prior to version 3.6.0, mcp-server-kubernetes exposes three environment variables (ALLOW_ONLY_READONLY_TOOLS, ALLOW_ONLY_NON_DESTRUCTIVE_TOOLS, ALLOWED_TOOLS) documented as access controls for restricting which Kubernetes operations are available. These controls are enforced at the tool discovery layer (tools/list) but not at the execution layer (tools/call). Any client that knows a tool name can invoke it directly regardless of the configured restriction mode. The access control was effectively cosmetic. This issue has been patched in version 3.6.0.