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Kubernetes CVE-2025-66404

| EUVDEUVD-2025-201109 MEDIUM
Command Injection (CWE-77)
2025-12-03 security-advisories@github.com GHSA-wvxp-jp4w-w8wg
6.4
CVSS 3.1 · GitHub Advisory
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Severity by source

GitHub Advisory PRIMARY
6.4 MEDIUM
AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H

Primary rating from GitHub Advisory · only source for this CVE.

CVSS VectorGitHub Advisory

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

5
EUVD ID Assigned
Mar 15, 2026 - 16:14 euvd
EUVD-2025-201109
Analysis Generated
Mar 15, 2026 - 16:14 vuln.today
Patch released
Mar 15, 2026 - 16:14 nvd
Patch available
PoC Detected
Dec 16, 2025 - 19:07 vuln.today
Public exploit code
CVE Published
Dec 03, 2025 - 21:15 nvd
MEDIUM 6.4

DescriptionGitHub Advisory

MCP Server Kubernetes is an MCP Server that can connect to a Kubernetes cluster and manage it. Prior to 2.9.8, there is a security issue exists in the exec_in_pod tool of the mcp-server-kubernetes MCP Server. The tool accepts user-provided commands in both array and string formats. When a string format is provided, it is passed directly to shell interpretation (sh -c) without input validation, allowing shell metacharacters to be interpreted. This vulnerability can be exploited through direct command injection or indirect prompt injection attacks, where AI agents may execute commands without explicit user intent. This vulnerability is fixed in 2.9.8.

Analysis

MCP Server Kubernetes is an MCP Server that can connect to a Kubernetes cluster and manage it. Prior to 2.9.8, there is a security issue exists in the exec_in_pod tool of the mcp-server-kubernetes MCP Server. The tool accepts user-provided commands in both array and string formats. When a string format is provided, it is passed directly to shell interpretation (sh -c) without input validation, allowing shell metacharacters to be interpreted. This vulnerability can be exploited through direct command injection or indirect prompt injection attacks, where AI agents may execute commands without explicit user intent. This vulnerability is fixed in 2.9.8.

Technical ContextAI

Command injection allows an attacker to execute arbitrary OS commands on the host system through a vulnerable application that passes user input to system shells.

RemediationAI

A vendor patch is available — apply it immediately. Avoid passing user input to system commands. Use language-specific APIs instead of shell commands. If unavoidable, use strict input validation and escaping.

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CVE-2025-66404 vulnerability details – vuln.today

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