CVE-2026-46519: FLUX159 Mcp-Server-Kubernetes

High severity, CVSS 8.8. EPSS: 0.6% chance of exploitation in the next 30 days.

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.

Affected products

• FLUX159 Mcp-Server-Kubernetes: before 3.6.0 (fixed in 3.6.0)

Published 2026-06-11. Last modified 2026-06-17.