Description
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
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-61459 ↗
- github.com/Flux159/mcp-server-kubernetes/commit/d7890f50a4567bf5d9842541ba6f41e180227f9a ↗
- github.com/Flux159/mcp-server-kubernetes/issues/328 ↗
- github.com/Flux159/mcp-server-kubernetes/pull/329 ↗
- github.com/Flux159/mcp-server-kubernetes/releases/tag/3.9.0 ↗
- www.vulncheck.com/advisories/mcp-server-kubernetes-argument-injection-via-kubectl-structured-tools ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.