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.

Project Subscriptions

Vendors Products
Flux159 Subscribe
Mcp-server-kubernetes Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-cr22-wjx7-2w6m MCP Server Kubernetes: Tool Access Control Bypass via Presentation-Layer Filtering Without Execution-Layer Enforcement
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 11 Jun 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Flux159
Flux159 mcp-server-kubernetes
Vendors & Products Flux159
Flux159 mcp-server-kubernetes

Thu, 11 Jun 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 11 Jun 2026 19:00:00 +0000

Type Values Removed Values Added
Description 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.
Title mcp-server-kubernetes Affected By Tool Access Control Bypass: Presentation-Layer Filtering Without Execution-Layer Enforcement
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 8.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}


Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-06-11T19:40:22.771Z

Reserved: 2026-05-14T19:12:32.755Z

Link: CVE-2026-46519

cve-icon Vulnrichment

Updated: 2026-06-11T19:40:09.332Z

cve-icon NVD

Status : Deferred

Published: 2026-06-11T19:16:42.213

Modified: 2026-06-11T21:01:26.377

Link: CVE-2026-46519

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-11T21:15:07Z

Weaknesses