Flux159 mcp-server-kubernetes up to 2.9.7 exec_in_pod command injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in Flux159 mcp-server-kubernetes up to 2.9.7. The impacted element is an unknown function of the component exec_in_pod. Performing a manipulation results in command injection. This vulnerability is cataloged as CVE-2025-66404. It is possible to initiate the attack remotely. There is no exploit available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Flux159 mcp-server-kubernetes up to 2.9.7. This affects an unknown functionality of the component exec_in_pod. The manipulation with an unknown input leads to a command injection vulnerability. CWE is classifying the issue as CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2025-66404 since 11/29/2025. The exploitability is told to be difficult. It is possible to initiate the attack remotely. Additional levels of successful authentication are needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading to version 2.9.8 eliminates this vulnerability. Applying the patch d091107ff92d9ffad1b3c295092f142d6578c48b is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Virtualization Software

Vendor

• Flux159

Name

• mcp-server-kubernetes

Version

• 2.9.0
• 2.9.1
• 2.9.2
• 2.9.3
• 2.9.4
• 2.9.5
• 2.9.6
• 2.9.7

License

• open-source

Website

• Product: https://github.com/Flux159/mcp-server-kubernetes/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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