CVE-2025-66404

mcp-server-kubernetes potential security issue in exec_in_pod tool

HIGH
8.8
CVSS Score
Published: December 3, 2025 at 08:40 PM UTC
Updated: June 17, 2026 at 09:56 AM UTC
2 products affected across 2 vendorsMcp Server KubernetesMcp Server Kubernetes

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Severity
HIGH8.8
Exploit prediction
EPSS 1%
SSVC
PoC

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 2.9.8
Affected range stops below 2.9.8, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-77

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