CVE-2026-61459
MCP Server Kubernetes < 3.9.0 Argument Injection via kubectl Structured Tools
- State
- Published
- Severity
- 9.3 Critical
- Published
- Jul 10, 2026
- Updated
- Jul 14, 2026
- Reserved
- Jul 9, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 9.3 Critical | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 9.8 Critical | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | VulnCheck |
Weaknesses
- CWE-88 Improper Neutralization of Argument Delimiters in a Command ('Argument Injection')
Affected Products
| Product | Versions |
|---|---|
mcp-server-kubernetesFlux159 |
|
References
- Release Notesrelease-notes
- Researcher Disclosureexploittechnical-description
- Pull Requestissue-tracking
- Patch Commitpatch
- https://www.vulncheck.com/advisories/mcp-server-kubernetes-argument-injection-via-kubectl-structured-toolsthird-party-advisory
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