{"items":[{"id":"NVI-00014005","kind":"vulnerability","title":"n8n: Expression Sandbox Escape via Class-Field Sanitizer Rebinding Can Lead to Code Execution","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hw8v-xxg5-vvvx","CVE-2026-86076"],"plain_summary":"GitHub lists this reviewed advisory for n8n, n8n, n8n. 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-10da5cfec0c3b2c516836e0dfb5cc51d"],"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":"EPSS","as_of":"2026-11-02T12:00:30.000Z","value":"0.793%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.5635. Missing scores are unknown.","source_id":"sr-10da5cfec0c3b2c516836e0dfb5cc51d"}],"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-303b6302e33990406c822e93faa4687f","url":"https://github.com/advisories/GHSA-hw8v-xxg5-vvvx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-hw8v-xxg5-vvvx","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T22:54:05.264Z"},{"id":"sr-10da5cfec0c3b2c516836e0dfb5cc51d","url":"https://www.first.org/epss/data.html","basis":"official_catalog","notes":"FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.","title":"CVE-2026-86076","publisher":"FIRST EPSS","observed_at":"2026-11-02T20:17:01.143Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-303b6302e33990406c822e93faa4687f"],"technology":"n8n","known_exclusions":[],"conditions_summary":"## Impact\n\nThe expression compiler's sanitizer resolved through a dynamically-scoped `this`, so a class field named `__sanitize` rebound it and reached the `Function` constructor. On the backend, any expression author could run code in the n8n process; in the editor preview, a member's expression could run as JavaScript in the session of whoever opened the workflow. The patch rejects reserved class-member names.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.76, 2.37.7, and 2.38.2. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict n8n instance access to fully trusted users only.\n- Avoid granting workflow-create or workflow-edit permissions to untrusted users.\n- Audit existing workflows for unexpected or unfamiliar expressions in node parameters.\n- Set `N8N_EXPRESSION_ENGINE=vm`.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","public_affected_ranges":["< 1.123.76"]},{"certainty":"source_listed","source_ids":["sr-303b6302e33990406c822e93faa4687f"],"technology":"n8n","known_exclusions":[],"conditions_summary":"## Impact\n\nThe expression compiler's sanitizer resolved through a dynamically-scoped `this`, so a class field named `__sanitize` rebound it and reached the `Function` constructor. On the backend, any expression author could run code in the n8n process; in the editor preview, a member's expression could run as JavaScript in the session of whoever opened the workflow. The patch rejects reserved class-member names.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.76, 2.37.7, and 2.38.2. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict n8n instance access to fully trusted users only.\n- Avoid granting workflow-create or workflow-edit permissions to untrusted users.\n- Audit existing workflows for unexpected or unfamiliar expressions in node parameters.\n- Set `N8N_EXPRESSION_ENGINE=vm`.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","public_affected_ranges":[">= 2.38.0, < 2.38.2"]},{"certainty":"source_listed","source_ids":["sr-303b6302e33990406c822e93faa4687f"],"technology":"n8n","known_exclusions":[],"conditions_summary":"## Impact\n\nThe expression compiler's sanitizer resolved through a dynamically-scoped `this`, so a class field named `__sanitize` rebound it and reached the `Function` constructor. On the backend, any expression author could run code in the n8n process; in the editor preview, a member's expression could run as JavaScript in the session of whoever opened the workflow. The patch rejects reserved class-member names.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.76, 2.37.7, and 2.38.2. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict n8n instance access to fully trusted users only.\n- Avoid granting workflow-create or workflow-edit permissions to untrusted users.\n- Audit existing workflows for unexpected or unfamiliar expressions in node parameters.\n- Set `N8N_EXPRESSION_ENGINE=vm`.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","public_affected_ranges":[">= 2.0.0, < 2.37.7"]}],"null_published_at":"2026-11-04T10:04:47.605Z","source_updated_at":"2026-09-10T15:11:08.000Z","source_disclosed_at":"2026-09-10T15:11:07.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.","null_first_observed_at":"2026-11-01T22:54:05.264Z"},{"id":"NVI-00014005","kind":"vulnerability","title":"n8n: Expression Sandbox Escape via Class-Field Sanitizer Rebinding Can Lead to Code Execution","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-hw8v-xxg5-vvvx","CVE-2026-86076"],"plain_summary":"GitHub lists this reviewed advisory for n8n, n8n, n8n. 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-303b6302e33990406c822e93faa4687f"],"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":[],"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-303b6302e33990406c822e93faa4687f","url":"https://github.com/advisories/GHSA-hw8v-xxg5-vvvx","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-hw8v-xxg5-vvvx","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T22:54:05.264Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-303b6302e33990406c822e93faa4687f"],"technology":"n8n","known_exclusions":[],"conditions_summary":"## Impact\n\nThe expression compiler's sanitizer resolved through a dynamically-scoped `this`, so a class field named `__sanitize` rebound it and reached the `Function` constructor. On the backend, any expression author could run code in the n8n process; in the editor preview, a member's expression could run as JavaScript in the session of whoever opened the workflow. The patch rejects reserved class-member names.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.76, 2.37.7, and 2.38.2. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict n8n instance access to fully trusted users only.\n- Avoid granting workflow-create or workflow-edit permissions to untrusted users.\n- Audit existing workflows for unexpected or unfamiliar expressions in node parameters.\n- Set `N8N_EXPRESSION_ENGINE=vm`.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","public_affected_ranges":["< 1.123.76"]},{"certainty":"source_listed","source_ids":["sr-303b6302e33990406c822e93faa4687f"],"technology":"n8n","known_exclusions":[],"conditions_summary":"## Impact\n\nThe expression compiler's sanitizer resolved through a dynamically-scoped `this`, so a class field named `__sanitize` rebound it and reached the `Function` constructor. On the backend, any expression author could run code in the n8n process; in the editor preview, a member's expression could run as JavaScript in the session of whoever opened the workflow. The patch rejects reserved class-member names.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.76, 2.37.7, and 2.38.2. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict n8n instance access to fully trusted users only.\n- Avoid granting workflow-create or workflow-edit permissions to untrusted users.\n- Audit existing workflows for unexpected or unfamiliar expressions in node parameters.\n- Set `N8N_EXPRESSION_ENGINE=vm`.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","public_affected_ranges":[">= 2.38.0, < 2.38.2"]},{"certainty":"source_listed","source_ids":["sr-303b6302e33990406c822e93faa4687f"],"technology":"n8n","known_exclusions":[],"conditions_summary":"## Impact\n\nThe expression compiler's sanitizer resolved through a dynamically-scoped `this`, so a class field named `__sanitize` rebound it and reached the `Function` constructor. On the backend, any expression author could run code in the n8n process; in the editor preview, a member's expression could run as JavaScript in the session of whoever opened the workflow. The patch rejects reserved class-member names.\n\n## Patches\n\nThe issue has been fixed in n8n versions 1.123.76, 2.37.7, and 2.38.2. Users should upgrade to one of these versions or later to remediate the vulnerability.\n\n## Workarounds\n\nIf upgrading is not immediately possible, administrators should consider the following temporary mitigations:\n- Restrict n8n instance access to fully trusted users only.\n- Avoid granting workflow-create or workflow-edit permissions to untrusted users.\n- Audit existing workflows for unexpected or unfamiliar expressions in node parameters.\n- Set `N8N_EXPRESSION_ENGINE=vm`.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.","public_affected_ranges":[">= 2.0.0, < 2.37.7"]}],"null_published_at":"2026-11-02T10:00:37.196Z","source_updated_at":"2026-09-10T15:11:08.000Z","source_disclosed_at":"2026-09-10T15:11:07.000Z","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":"2026-11-01T22:54:05.264Z"}],"next_cursor":null,"snapshot_revision":"42594"}