CVE-2026-46519 Details
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.
A vulnerability in mcp-server-kubernetes, a Model Context Protocol server for Kubernetes management, allows bypassing access controls intended to restrict available Kubernetes operations. Prior to version 3.6.0, the server exposed environment variables that were supposed to manage tool access. However, these controls were only applied at the tool discovery layer and not during execution, enabling any client to invoke tools directly, regardless of the restrictions in place. This flaw rendered the access controls largely cosmetic. The vulnerability has been patched in version 3.6.0.
Users should upgrade to mcp-server-kubernetes version 3.6.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 11, 2026CISA-ADP
Assessed Jun 11, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-cr22-wjx7-2w6m | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/Flux159/mcp-server-kubernetes/releases/tag/v3.6.0 | [email protected] | Release NotesVendor |
| https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-cr22-wjx7-2w6m | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-863 | Incorrect Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Flux159 mcp-server-kubernetes | < 3.6.0 (semver) |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Jun 11, 2026 | CVE Modified | CISA-ADP |
| Jun 11, 2026 | New CVE Received | [email protected] |