{"items":[{"id":"NVI-00018666","kind":"vulnerability","title":"n8n-MCP: Workflow telemetry sanitizer could retain partial values from URL-shaped node parameters","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-f3rg-xqjj-cj9w","CVE-2026-45582"],"plain_summary":"GitHub lists this reviewed advisory for n8n-mcp. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-4d7699213ab726f3549d1172681c97ba"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-06-09T10:27:24.000Z","value":"6.5 medium","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-4d7699213ab726f3549d1172681c97ba"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-4d7699213ab726f3549d1172681c97ba","url":"https://github.com/advisories/GHSA-f3rg-xqjj-cj9w","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-f3rg-xqjj-cj9w","publisher":"GitHub Advisory Database","observed_at":"2026-11-06T20:58:31.464Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-4d7699213ab726f3549d1172681c97ba"],"technology":"n8n-mcp","known_exclusions":[],"conditions_summary":"## Summary\n\nIn affected versions of n8n-mcp, the workflow telemetry sanitizer could retain partial fragments of URL-shaped node parameters before sending workflow data to the project's anonymous telemetry backend. Values placed in HTTP-Request-style node parameters — such as customer or tenant identifiers, short secrets embedded in query strings, and signed request parameters — could therefore appear in stored telemetry, contrary to the collection boundary documented in `PRIVACY.md`.\n\n## Impact\n\nOperators with access to the project's telemetry backend could read partial fragments of workflow URL parameters that should not have been collected. The bug was scoped to URL-shaped fields in workflow *definitions*; credentials, OAuth tokens, and workflow *execution* data are not affected — credentials are removed by a separate code path, and long secrets and known-provider tokens are matched by dedicated patterns.\n\n## Patches\n\nFixed in **n8n-mcp `2.51.3`**. Upgrading is the recommended remediation.\n\n## Workarounds\n\nFor users who cannot upgrade immediately, disable anonymous telemetry by setting any of these environment variables to `true`:\n\n- `N8N_MCP_TELEMETRY_DISABLED`\n- `TELEMETRY_DISA","public_affected_ranges":["< 2.51.3"]}],"null_published_at":"2026-11-07T07:07:42.454Z","source_updated_at":"2026-06-09T10:27:24.000Z","source_disclosed_at":"2026-05-18T13:26:51.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-06T20:58:31.464Z"}],"next_cursor":null,"snapshot_revision":"42594"}