{"id":"PYSEC-2026-3685","summary":"mcp-server-kubernetes argument injection can expose Kubernetes cluster credentials","details":"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.","aliases":["CVE-2026-61459","GHSA-wmg3-h8mf-wgvr"],"modified":"2026-08-19T12:45:06.485001885Z","published":"2026-08-19T11:56:25.076274Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-61459"},{"type":"WEB","url":"https://github.com/Flux159/mcp-server-kubernetes/issues/328"},{"type":"WEB","url":"https://github.com/Flux159/mcp-server-kubernetes/pull/329"},{"type":"WEB","url":"https://github.com/Flux159/mcp-server-kubernetes/commit/d7890f50a4567bf5d9842541ba6f41e180227f9a"},{"type":"PACKAGE","url":"https://github.com/Flux159/mcp-server-kubernetes"},{"type":"WEB","url":"https://github.com/Flux159/mcp-server-kubernetes/releases/tag/3.9.0"},{"type":"WEB","url":"https://www.vulncheck.com/advisories/mcp-server-kubernetes-argument-injection-via-kubectl-structured-tools"},{"type":"PACKAGE","url":"https://pypi.org/project/mcp-server-kubernetes"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-wmg3-h8mf-wgvr"}],"affected":[{"package":{"name":"mcp-server-kubernetes","ecosystem":"PyPI","purl":"pkg:pypi/mcp-server-kubernetes"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.9.0"}]}],"versions":["0.1.0","0.1.1","0.1.2","0.1.3","0.1.6"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/mcp-server-kubernetes/PYSEC-2026-3685.yaml"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},{"type":"CVSS_V4","score":"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"}]}