CVE-2026-86084: CWE-288: Authentication Bypass Using an Alternate Path or Channel in n8n-io n8n
n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the public OIDC login and callback endpoints completed authentication even when OIDC was not the enabled active authentication method. An Enterprise administrator who had configured and later disabled an identity provider still exposed a working route that could issue valid sessions. The affected logic is packages/cli/src/modules/sso-oidc/oidc.service.ee.ts, including generateLoginUrl and the callback flow that lacked assertOidcLoginEnabled. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
AI Analysis
Technical Summary
The vulnerability (CVE-2026-86084) in n8n-io n8n is an authentication bypass (CWE-288) caused by the public OIDC login and callback endpoints completing authentication despite OIDC not being the enabled authentication method. Specifically, an Enterprise administrator who configured and later disabled an identity provider could still use a working route to obtain valid sessions. The affected code is in packages/cli/src/modules/sso-oidc/oidc.service.ee.ts, involving the generateLoginUrl function and the callback flow that lacks the assertOidcLoginEnabled check. This issue is resolved in n8n versions 1.123.76, 2.37.7, and 2.38.2.
Potential Impact
An attacker with Enterprise administrator privileges who previously configured an identity provider and then disabled it can bypass intended authentication restrictions and obtain valid authenticated sessions. This could lead to unauthorized access within the n8n platform. The CVSS 4.0 score is 6.0 (medium severity), reflecting network attack vector, low attack complexity, partial privileges required, no user interaction, and high impact on confidentiality.
Mitigation Recommendations
Upgrade n8n to version 1.123.76, 2.37.7, or 2.38.2 or later, where the authentication bypass vulnerability has been fixed. No other mitigations are indicated. Patch status is confirmed by the vendor advisory stating the issue is fixed in these versions.
CVE-2026-86084: CWE-288: Authentication Bypass Using an Alternate Path or Channel in n8n-io n8n
Description
n8n is an open source workflow automation platform. Prior to 1.123.76, 2.37.7, and 2.38.2, the public OIDC login and callback endpoints completed authentication even when OIDC was not the enabled active authentication method. An Enterprise administrator who had configured and later disabled an identity provider still exposed a working route that could issue valid sessions. The affected logic is packages/cli/src/modules/sso-oidc/oidc.service.ee.ts, including generateLoginUrl and the callback flow that lacked assertOidcLoginEnabled. This issue is fixed in versions 1.123.76, 2.37.7 and 2.38.2.
CVSS v4.0
Score 6.0medium
Affected software
pkg:github/n8n-io/n8nRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability (CVE-2026-86084) in n8n-io n8n is an authentication bypass (CWE-288) caused by the public OIDC login and callback endpoints completing authentication despite OIDC not being the enabled authentication method. Specifically, an Enterprise administrator who configured and later disabled an identity provider could still use a working route to obtain valid sessions. The affected code is in packages/cli/src/modules/sso-oidc/oidc.service.ee.ts, involving the generateLoginUrl function and the callback flow that lacks the assertOidcLoginEnabled check. This issue is resolved in n8n versions 1.123.76, 2.37.7, and 2.38.2.
Potential Impact
An attacker with Enterprise administrator privileges who previously configured an identity provider and then disabled it can bypass intended authentication restrictions and obtain valid authenticated sessions. This could lead to unauthorized access within the n8n platform. The CVSS 4.0 score is 6.0 (medium severity), reflecting network attack vector, low attack complexity, partial privileges required, no user interaction, and high impact on confidentiality.
Mitigation Recommendations
Upgrade n8n to version 1.123.76, 2.37.7, or 2.38.2 or later, where the authentication bypass vulnerability has been fixed. No other mitigations are indicated. Patch status is confirmed by the vendor advisory stating the issue is fixed in these versions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-09-04T19:34:03.101Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6aa13d6bacd9273b49346a7e
Added to database: 09/09/2026, 11:05:15 UTC
Last enriched: 09/09/2026, 11:38:18 UTC
Last updated: 09/09/2026, 22:52:15 UTC
Views: 10
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