{"id":"CVE-2026-123811","summary":"Dynatrace MCP Server: Unauthenticated HTTP MCP Tool Invocation in `@dynatrace-oss/dynatrace-mcp-server`","details":"Dynatrace MCP Server is an MCP server for Dynatrace Observability. Prior to 2.0.0, a server started with the --http option accepts JSON-RPC tools/call requests without authentication, session validation, or Host and Origin protections before dispatching them under the server's configured Dynatrace credentials. A network-reachable caller can invoke execute_dql to read logs, security events, user sessions, and other Grail data, or invoke create_dynatrace_notebook to create tenant-visible notebooks. The send_event path is not affected because its requestHumanApproval gate blocks this attack path, and reset_grail_budget only demonstrates dispatch without accessing Dynatrace data. This issue is fixed in version 2.0.0.","aliases":["GHSA-p7w7-4929-vpj5"],"modified":"2026-11-10T10:46:29.657268181Z","published":"2026-11-09T21:01:42.490Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-306"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123811.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/123xxx/CVE-2026-123811.json"},{"type":"FIX","url":"https://github.com/dynatrace-oss/dynatrace-mcp/commit/8f12972481e9165e8bd24d63b0a9e71976f85a43"},{"type":"FIX","url":"https://github.com/dynatrace-oss/dynatrace-mcp/commit/ac5251edfcf9511c6c662414da743383e7d1451c"},{"type":"FIX","url":"https://github.com/dynatrace-oss/dynatrace-mcp/commit/ead820322238633f5b289778c57faf5d3a8d73f9"},{"type":"WEB","url":"https://github.com/dynatrace-oss/dynatrace-mcp/releases/tag/v2.0.0"},{"type":"ADVISORY","url":"https://github.com/dynatrace-oss/dynatrace-mcp/security/advisories/GHSA-p7w7-4929-vpj5"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123811"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/dynatrace-oss/dynatrace-mcp","events":[{"introduced":"0"},{"fixed":"64dfcb1095823d0fb43013635446288a6ff60e29"},{"fixed":"8f12972481e9165e8bd24d63b0a9e71976f85a43"},{"fixed":"ac5251edfcf9511c6c662414da743383e7d1451c"},{"fixed":"ead820322238633f5b289778c57faf5d3a8d73f9"}],"database_specific":{"extracted_events":[{"source":"AFFECTED_FIELD","strategy":"StringRangeExpression","range":[{"introduced":"0"},{"fixed":"2.0.0"}]},{"range":[{"fixed":"8f12972481e9165e8bd24d63b0a9e71976f85a43"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_COMMIT","range":[{"fixed":"ac5251edfcf9511c6c662414da743383e7d1451c"}]},{"range":[{"fixed":"ead820322238633f5b289778c57faf5d3a8d73f9"}],"source":"REFERENCES_COMMIT"},{"source":"REFERENCES_TAG","original_tag":"v2.0.0","range":[{"fixed":"64dfcb1095823d0fb43013635446288a6ff60e29"}]}]}}],"versions":["v1.8.7","v1.8.6","v1.8.5","v1.8.4","v1.8.3","v1.8.2","v1.8.1","v1.8.0","v1.7.6","v1.7.5","v1.7.4","v1.7.3","v1.7.2","v1.7.1","v1.7.0","v1.6.1","v1.6.0","v1.5.3","v1.5.2","v1.5.1","v1.5.0","v1.5.0-beta.3","v1.4.0","v1.3.1","v1.3.0","v1.2.0","v1.1.0","v1.0.1","v1.0.0-rc.1","v1.0.0","v0.13.0","v0.12.0","v0.11.0","v0.10.0","v0.9.2","v0.9.1","v0.9.0","v0.8.0","v0.7.0","v0.6.1","v0.6.0","v0.6.0-rc.2","v0.6.0-rc.1","v0.5.0","v0.5.0-rc.4","v0.5.0-rc.3","v0.5.0-rc.2","v0.5.0-rc.1","v0.4.0","v0.3.0","v0.2.0","v0.1.4","v0.1.3","v0.1.2","v0.1.1"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-123811.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:L/A:L"}]}