{"schema_version":"1.9.2","id":"GHSA-wmg3-h8mf-wgvr","published":"2026-07-10T21:32:32Z","modified":"2026-10-28T15:15:05.434117744Z","aliases":["CVE-2026-61459","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.","affected":[{"package":{"name":"mcp-server-kubernetes","ecosystem":"npm","purl":"pkg:npm/mcp-server-kubernetes"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.9.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/07/GHSA-wmg3-h8mf-wgvr/GHSA-wmg3-h8mf-wgvr.json"}}],"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"}],"database_specific":{"cwe_ids":["CWE-88"],"github_reviewed":true,"github_reviewed_at":"2026-08-12T19:26:54Z","nvd_published_at":"2026-07-10T19:17:27Z","severity":"CRITICAL"},"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"}]}