CVE-2026-46519Public exploitNetwork attack vector

Unauthorized Kubernetes operations via unchecked tool calls

Published Jun 11, 2026 · Updated Jun 11, 2026

Incorrect authorization in MCP Server Kubernetes before 3.6.0 allows remote authenticated users to invoke restricted Kubernetes tools. The CallToolRequestSchema handler in src/index.ts dispatches named tools without applying the allow-set filtering used by ListToolsRequestSchema. Access to the MCP endpoint is required, and resulting cluster read, write, execution, or deletion capabilities are bounded by the server's Kubernetes credentials.

CVSS severity8.8
High
EPSS probability0.38%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in MCP Server Kubernetes before 3.6.0 allows remote authenticated users to invoke restricted Kubernetes tools. The CallToolRequestSchema handler in src/index.ts dispatches named tools without applying the allow-set filtering used by ListToolsRequestSchema. Access to the MCP endpoint is required, and resulting cluster read, write, execution, or deletion capabilities are bounded by the server's Kubernetes credentials.

The record

CVE
CVE-2026-46519
Published
Jun 11, 2026
Updated
Jun 11, 2026
Vendor
Flux159
Product
MCP Server Kubernetes
Classifications
CWE-863, T1609
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.6.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Flux159 · MCP Server Kubernetesversion=< 3.6.0

Published CVSS scores

8.8GitHubCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1609Container Administration Command

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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