{"id":"CVE-2026-46519","summary":"mcp-server-kubernetes Affected By Tool Access Control Bypass: Presentation-Layer Filtering Without Execution-Layer Enforcement","details":"mcp-server-kubernetes is a Model Context Protocol server for Kubernetes cluster management. Prior to version 3.6.0, mcp-server-kubernetes exposes three environment variables (ALLOW_ONLY_READONLY_TOOLS, ALLOW_ONLY_NON_DESTRUCTIVE_TOOLS, ALLOWED_TOOLS) documented as access controls for restricting which Kubernetes operations are available. These controls are enforced at the tool discovery layer (tools/list) but not at the execution layer (tools/call). Any client that knows a tool name can invoke it directly regardless of the configured restriction mode. The access control was effectively cosmetic. This issue has been patched in version 3.6.0.","aliases":["GHSA-cr22-wjx7-2w6m"],"modified":"2026-08-12T03:51:31.843827984Z","published":"2026-06-11T18:34:15.281Z","related":["openSUSE-SU-2026:10914-1","openSUSE-SU-2026:21152-1"],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-863"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46519.json"},"references":[{"type":"WEB","url":"https://github.com/Flux159/mcp-server-kubernetes/releases/tag/v3.6.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/46xxx/CVE-2026-46519.json"},{"type":"ADVISORY","url":"https://github.com/Flux159/mcp-server-kubernetes/security/advisories/GHSA-cr22-wjx7-2w6m"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-46519"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/flux159/mcp-server-kubernetes","events":[{"introduced":"0"},{"fixed":"16579d431157350f03682aabc30d7f6ae708724b"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"fixed":"3.6.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"versions":["3.5.1","v3.5.1","3.5.0","v3.5.0","3.4.0","v3.4.0","3.3.0","v3.3.0","v3.2.2","3.2.1","v3.2.1","3.2.0","v3.2.0","3.1.1","v3.1.1","3.1.0","v3.1.0","3.0.5","v3.0.5","3.0.4","v3.0.4","3.0.3","v3.0.3","3.0.2","v3.0.2","3.0.1","v3.0.1","3.0.0","v3.0.0","2.9.9","v2.9.9","2.9.8","v2.9.8","2.9.7","v2.9.7","2.9.6","v2.9.6","2.9.5","v2.9.5","2.9.4","v2.9.4","2.9.3","v2.9.3","2.9.2","v2.9.2","2.9.1","v2.9.1","2.9.0","v2.9.0","2.8.0","v2.8.0","2.7.0","v2.7.0","2.6.0","v2.6.0","2.5.1","v2.5.1","2.5.0","v2.5.0","2.4.9","v2.4.9","v2.4.8","2.4.7","v2.4.7","2.4.6","v2.4.6","2.4.5","v2.4.5","2.4.4","v2.4.4","2.4.3","2.4.1","v2.4.3","2.4.2","v2.4.2","v2.4.1","2.4.0","2.3.1","v2.4.0","v2.3.1","2.3.0","v2.3.0","2.2.1","v2.2.1","2.2.0","v2.2.0","2.1.1","v2.1.1","2.1.0","v2.1.0","2.0.0","v2.0.0","1.6.2","v1.6.2","1.6.1","v1.6.1","1.6.0","v1.6.0","1.5.0","v1.5.0","1.4.0","v1.4.0","1.3.2","v1.3.2","1.3.1","v1.3.1","1.3.0","v1.3.0","1.2.0","v1.2.0","1.1.0","v1.1.0","1.0.1","v1.0.1","1.0.0","v1.0.0","0.4.0","v0.4.0","0.3.2","v0.3.2","0.3.1","v0.3.1","0.3.0","v0.3.0","0.2.5","v0.2.5","0.2.4","v0.2.4","v0.2.3","v0.2.2","v0.2.1","v0.2.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-46519.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}