GHSA-wmg3-h8mf-wgvr
mcp-server-kubernetes argument injection can expose Kubernetes cluster credentials
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | mcp-server-kubernetes | < 3.9.0 | 3.9.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
MCP Server Kubernetes before 3.9.0 contains an argument injection vulnerability in structured tools (kubectl_get, kubectl_describe, kubectl_delete) that allows attackers to bypass the assertNoDangerousFlags security check by supplying resourceType and name parameters with leading dashes. Attackers can inject the --server flag to redirect kubectl commands to an attacker-controlled API server, causing the operator's bearer token to be transmitted externally and enabling full cluster compromise.
References
External links from the advisory. They lead to third-party sites.
- https://nvd.nist.gov/vuln/detail/CVE-2026-61459
- https://github.com/Flux159/mcp-server-kubernetes/issues/328
- https://github.com/Flux159/mcp-server-kubernetes/pull/329
- https://github.com/Flux159/mcp-server-kubernetes/commit/d7890f50a4567bf5d9842541ba6f41e180227f9a
- https://github.com/Flux159/mcp-server-kubernetes
- https://github.com/Flux159/mcp-server-kubernetes/releases/tag/3.9.0
- https://www.vulncheck.com/advisories/mcp-server-kubernetes-argument-injection-via-kubectl-structured-tools