{"items":[{"id":"NVI-00012987","kind":"vulnerability","title":"Langflow: Unauthenticated Flow Execution via Webhook Authentication Bypass","revision":3,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-cf6m-vc3m-7cgm","CVE-2026-8505"],"plain_summary":"GitHub lists this reviewed advisory for langflow. 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-01317f1ba5b13eb5daf50651abdf67fa"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. 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This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE) or Denial of Service (DoS).\n\n### Details\nThe `WEBHOOK_AUTH_ENABLE` setting was introduced in v1.7.0 (#9139) with a default of `False`. The root cause is in the webhook authentication path, `AuthService.get_webhook_user` (`src/backend/base/langflow/services/auth/service.py`; the thin wrapper in `src/backend/base/langflow/services/auth/utils.py` just delegates to it):\n\n```python\nasync def get_webhook_user(self, flow_id: str, request: Request) -> UserRead:\n    settings_service = self.settings\n    ...\n    # VULNERABILITY: If this setting is False (default in <= 1.9.0), it returns\n    # the flow owner WITHOUT checking the API Key in the request.\n    if not settings_service.auth_settings.WEBHOOK_AUTH_ENABLE:\n        try:\n            flow_owner = await get_user_by_flow_id_or_endpoint_name(flow_id)","public_affected_ranges":[">= 1.7.0, <= 1.9.0"]}],"null_published_at":"2026-11-07T07:07:42.512Z","source_updated_at":"2026-10-05T22:31:23.000Z","source_disclosed_at":"2026-10-05T22:31:22.000Z","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":"2026-11-01T01:39:10.636Z"},{"id":"NVI-00012987","kind":"vulnerability","title":"Langflow: Unauthenticated Flow Execution via Webhook Authentication Bypass","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-cf6m-vc3m-7cgm","CVE-2026-8505"],"plain_summary":"GitHub lists this reviewed advisory for langflow. 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-229495d212ecfde22d89e8b0fc33ec89"],"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":"2026-10-05T22:31:23.000Z","value":"9.8 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2fa6e5bf7130dbc2bc37e74f842c9f40"},{"kind":"EPSS","as_of":"2026-11-01T12:00:16.000Z","value":"0.870%","meaning":"FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.58832. Missing scores are unknown.","source_id":"sr-229495d212ecfde22d89e8b0fc33ec89"}],"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-2fa6e5bf7130dbc2bc37e74f842c9f40","url":"https://github.com/advisories/GHSA-cf6m-vc3m-7cgm","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-cf6m-vc3m-7cgm","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T01:39:10.636Z"},{"id":"sr-229495d212ecfde22d89e8b0fc33ec89","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-2026-8505","publisher":"FIRST EPSS","observed_at":"2026-11-01T14:28:32.289Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2fa6e5bf7130dbc2bc37e74f842c9f40"],"technology":"langflow","known_exclusions":[],"conditions_summary":"### Summary\nA vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the `WEBHOOK_AUTH_ENABLE` configuration is set to `False`. This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE) or Denial of Service (DoS).\n\n### Details\nThe `WEBHOOK_AUTH_ENABLE` setting was introduced in v1.7.0 (#9139) with a default of `False`. The root cause is in the webhook authentication path, `AuthService.get_webhook_user` (`src/backend/base/langflow/services/auth/service.py`; the thin wrapper in `src/backend/base/langflow/services/auth/utils.py` just delegates to it):\n\n```python\nasync def get_webhook_user(self, flow_id: str, request: Request) -> UserRead:\n    settings_service = self.settings\n    ...\n    # VULNERABILITY: If this setting is False (default in <= 1.9.0), it returns\n    # the flow owner WITHOUT checking the API Key in the request.\n    if not settings_service.auth_settings.WEBHOOK_AUTH_ENABLE:\n        try:\n            flow_owner = await get_user_by_flow_id_or_endpoint_name(flow_id)","public_affected_ranges":[">= 1.7.0, <= 1.9.0"]}],"null_published_at":"2026-11-04T18:04:03.175Z","source_updated_at":"2026-10-05T22:31:23.000Z","source_disclosed_at":"2026-10-05T22:31:22.000Z","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":"2026-11-01T01:39:10.636Z"},{"id":"NVI-00012987","kind":"vulnerability","title":"Langflow: Unauthenticated Flow Execution via Webhook Authentication Bypass","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-cf6m-vc3m-7cgm","CVE-2026-8505"],"plain_summary":"GitHub lists this reviewed advisory for langflow. 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-2fa6e5bf7130dbc2bc37e74f842c9f40"],"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":"2026-10-05T22:31:23.000Z","value":"9.8 critical","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-2fa6e5bf7130dbc2bc37e74f842c9f40"}],"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-2fa6e5bf7130dbc2bc37e74f842c9f40","url":"https://github.com/advisories/GHSA-cf6m-vc3m-7cgm","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-cf6m-vc3m-7cgm","publisher":"GitHub Advisory Database","observed_at":"2026-11-01T01:39:10.636Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-2fa6e5bf7130dbc2bc37e74f842c9f40"],"technology":"langflow","known_exclusions":[],"conditions_summary":"### Summary\nA vulnerability in Langflow's webhook authentication logic allows unauthenticated users to trigger the execution of any flow. The system incorrectly bypasses API key validation when the `WEBHOOK_AUTH_ENABLE` configuration is set to `False`. This allows a remote attacker who knows a flow's UUID to execute it as if they were the owner, potentially leading to Remote Code Execution (RCE) or Denial of Service (DoS).\n\n### Details\nThe `WEBHOOK_AUTH_ENABLE` setting was introduced in v1.7.0 (#9139) with a default of `False`. The root cause is in the webhook authentication path, `AuthService.get_webhook_user` (`src/backend/base/langflow/services/auth/service.py`; the thin wrapper in `src/backend/base/langflow/services/auth/utils.py` just delegates to it):\n\n```python\nasync def get_webhook_user(self, flow_id: str, request: Request) -> UserRead:\n    settings_service = self.settings\n    ...\n    # VULNERABILITY: If this setting is False (default in <= 1.9.0), it returns\n    # the flow owner WITHOUT checking the API Key in the request.\n    if not settings_service.auth_settings.WEBHOOK_AUTH_ENABLE:\n        try:\n            flow_owner = await get_user_by_flow_id_or_endpoint_name(flow_id)","public_affected_ranges":[">= 1.7.0, <= 1.9.0"]}],"null_published_at":"2026-11-01T07:29:12.906Z","source_updated_at":"2026-10-05T22:31:23.000Z","source_disclosed_at":"2026-10-05T22:31:22.000Z","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":"2026-11-01T01:39:10.636Z"}],"next_cursor":null,"snapshot_revision":"42594"}