CVE-2025-66404: medium-severity vulnerability in Flux159 mcp-server-kubernetes
mcp-server-kubernetes potential security issue in exec_in_pod tool
Published
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.4epss 1.5%
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.
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
Affected products
Flux159 · mcp-server-kubernetesRelated CVEs — Flux159 mcp-server-kubernetes
In the same product, most dangerous first.
CVE-2026-61459CRITICALMCP Server Kubernetes < 3.9.0 Argument Injection via kubectl Structured ToolsEPSS 2.4%CVE-2025-53355HIGHmcp-server-kubernetes vulnerable to command injection in several toolsEPSS 2.2%CVE-2026-46519HIGHmcp-server-kubernetes Affected By Tool Access Control Bypass: Presentation-Layer Filtering Without Execution-Layer EnforcementEPSS 0.5%CVE-2026-47250MEDIUMmcp-server-kubernetes: kubectl-generic flag injection enables Kubernetes bearer token exfiltrationEPSS 0.4%CVE-2026-39884HIGHMCP Server Kubernetes has Argument Injection in its port_forward tool via space-splittingEPSS 0.3%