Critical severity9.8NVD Advisory· Published Jul 10, 2026· Updated Jul 17, 2026
CVE-2026-61459
CVE-2026-61459
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.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
mcp-server-kubernetesPyPI | < 3.9.0 | 3.9.0 |
Affected products
2- cpe:2.3:a:suyogs:mcp-server-kubernetes:*:*:*:*:*:node.js:*:*Range: <3.9.0
- Range: <3.9.0
Patches
Vulnerability mechanics
References
7- github.com/Flux159/mcp-server-kubernetes/commit/d7890f50a4567bf5d9842541ba6f41e180227f9anvdPatchWEB
- github.com/Flux159/mcp-server-kubernetes/pull/329nvdIssue TrackingPatchWEB
- github.com/Flux159/mcp-server-kubernetes/issues/328nvdIssue TrackingExploitMitigationVendor AdvisoryWEB
- github.com/advisories/GHSA-wmg3-h8mf-wgvrghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-61459ghsaADVISORY
- www.vulncheck.com/advisories/mcp-server-kubernetes-argument-injection-via-kubectl-structured-toolsnvdThird Party AdvisoryWEB
- github.com/Flux159/mcp-server-kubernetes/releases/tag/3.9.0nvdRelease NotesWEB
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