{"items":[{"id":"NVI-00017654","kind":"vulnerability","title":"n8n-MCP: Cross-tenant access to workflow version backups in multi-tenant HTTP deployments","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-j6r7-6fhx-77wx","CVE-2026-54052"],"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-3b7d264ce76136f061ea0d6ad62edc65"],"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":"2026-07-14T19:07:15.000Z","value":"9.9 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-3b7d264ce76136f061ea0d6ad62edc65"}],"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-3b7d264ce76136f061ea0d6ad62edc65","url":"https://github.com/advisories/GHSA-j6r7-6fhx-77wx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-j6r7-6fhx-77wx","publisher":"GitHub Advisory Database","observed_at":"2026-11-04T23:34:12.429Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-3b7d264ce76136f061ea0d6ad62edc65"],"technology":"n8n-mcp","known_exclusions":[],"conditions_summary":"## Impact\n\nIn multi-tenant HTTP deployments — where a single n8n-mcp server serves several tenants — the locally stored workflow version history (the automatic backups taken before workflow updates) was not isolated per tenant. An authenticated tenant could read workflow version snapshots belonging to other tenants, and could delete or destroy other tenants' stored backups.\n\nA stored snapshot includes full node definitions, so the exposed data can contain credential references and authorization headers configured on nodes. This is therefore a confidentiality issue in addition to an integrity/availability one.\n\n## Affected configurations\n\n- HTTP mode with multi-tenancy enabled (`ENABLE_MULTI_TENANT=true`), where multiple tenants are served by a single shared instance and database.\n\nNot affected:\n\n- stdio / single-user deployments (e.g. Claude Desktop).\n- Single-tenant HTTP deployments (one tenant per instance and database).\n\n## Affected versions\n\n`<= 2.56.0`\n\n## Patched version\n\n`2.56.1`. The stored version history is now isolated per instance, so a tenant can only access its own backups. Upgrading runs a one-time migration that isolates existing history and clears previously stored","public_affected_ranges":["<= 2.56.0"]}],"null_published_at":"2026-11-05T19:10:21.447Z","source_updated_at":"2026-07-14T19:07:15.000Z","source_disclosed_at":"2026-07-14T19:07:14.000Z","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":"2026-11-04T23:34:12.429Z"}],"next_cursor":null,"snapshot_revision":"42594"}