CVE-2026-86084: n8n Disabled OIDC SSO Endpoints Remain Vulnerability

MODERATE
Advisory Identifier: GHSA-pf83-w3f9-8m37
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CWE-288
Published
Advisory Summary

CVE-2026-86084 is a MODERATE disabled oidc sso endpoints remain vulnerability (CWE-288: Authentication Bypass Using an Alternate Path or Channel) affecting n8n libraries in the npm ecosystem. The issue involves disabled oidc sso endpoints remain active and issue valid sessions. Remediation is available by upgrading affected packages to version 1.123.76, 2.38.2, 2.37.7.

CVE-2026-86084 at a Glance

CVE Identifier CVE-2026-86084
GHSA Identifier GHSA-pf83-w3f9-8m37
Severity MODERATE
CVSS v3.1 Base Score N/A
CWE Classification CWE-288: Authentication Bypass Using an Alternate Path or Channel
Affected Product n8n
Package Ecosystem npm
Published Date
Last Updated

How to Fix CVE-2026-86084

To remediate this vulnerability, upgrade all affected n8n dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

n8n fixed: 1.123.76 
npm install n8n@1.123.76
n8n fixed: 2.38.2 
npm install n8n@2.38.2
n8n fixed: 2.37.7 
npm install n8n@2.37.7
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls n8n

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-86084, inspect your project dependencies using npm:

npm ls n8n

Analyze the terminal output to locate any version of n8n in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 1.123.76), your application is affected.

Note: The npm ls n8n command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-288: Authentication Bypass Using an Alternate Path or Channel, where the product requires authentication, but the product has an alternate path or channel that does not require authentication. In n8n, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Impact The public OIDC login and callback endpoints ran the full flow whether or not OIDC was the instance's active, enabled authentication method, so turning OIDC off in Settings did not stop it issuing sessions. An administrator who disabled the provider still had a working login route. The patch requires OIDC to be the enabled, active authentication method before either endpoint starts the flow or issues a session. The issue affects n8n Enterprise instances where OIDC was configured at least once and subsequently disabled. ## Patches The 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. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Disable or revoke the corresponding application or client at the IdP level to prevent the OIDC flow from completing. - Restrict network-level access to the n8n instance to trusted users only. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

CVE-2026-86084 Affected n8n Versions

3 component(s)
Fixed Versions:
1.123.762.38.22.37.7
Product / Package Ecosystem Affected Versions Fixed Version
n8n
npm/n8n
npm
< 1.123.76
1.123.76
n8n
npm/n8n
npm
≥ 2.38.0
< 2.38.2
2.38.2
n8n
npm/n8n
npm
≥ 2.0.0
< 2.37.7
2.37.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/n8n-io/n8n/security/advisories/GHSA-pf83-w3f9-8m37
NVD — CVE-2026-86084 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-86084
n8n Source Repository REPOSITORY
https://github.com/n8n-io/n8n
n8n Release RELEASE
https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76
n8n Release RELEASE
https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7
n8n Release RELEASE
https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2

Frequently Asked Questions

What is CVE-2026-86084?
CVE-2026-86084 is a security vulnerability in n8n involving Disabled OIDC SSO Endpoints Remain Active and Issue Valid Sessions under CWE-288: Authentication Bypass Using an Alternate Path or Channel.
Which n8n versions are affected?
Affected versions include releases prior to 1.123.76, 2.38.2, 2.37.7 across affected packages: n8n.
What version fixes CVE-2026-86084?
Upgrading to 1.123.76, 2.38.2, 2.37.7 (or the latest patched release for your respective branch) resolves the vulnerability.
Is n8n affected?
Yes, n8n is affected in releases prior to 1.123.76, 2.38.2, 2.37.7. Upgrade your dependency to 1.123.76, 2.38.2, 2.37.7 or later.
What CWE is associated with CVE-2026-86084?
CVE-2026-86084 is classified under CWE-288: Authentication Bypass Using an Alternate Path or Channel (The product requires authentication, but the product has an alternate path or channel that does not require authentication.).
How can I check npm dependencies for CVE-2026-86084?
Run the dependency tree command: 'npm ls n8n'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pf83-w3f9-8m37",
  "modified" : "2026-09-10T21:07:24Z",
  "published" : "2026-09-10T21:07:24Z",
  "aliases" : [ "CVE-2026-86084" ],
  "summary" : "n8n: Disabled OIDC SSO Endpoints Remain Active and Issue Valid Sessions",
  "details" : "## Impact\n\nThe public OIDC login and callback endpoints ran the full flow whether or not OIDC was the instance's active, enabled authentication method, so turning OIDC off in Settings did not stop it issuing sessions. An administrator who disabled the provider still had a working login route. The patch requires OIDC to be the enabled, active authentication method before either endpoint starts the flow or issues a session.\n\nThe issue affects n8n Enterprise instances where OIDC was configured at least once and subsequently disabled.\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- Disable or revoke the corresponding application or client at the IdP level to prevent the OIDC flow from completing.\n- Restrict network-level access to the n8n instance to trusted users only.\n\nThese workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "n8n"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "1.123.76"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "n8n"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.38.0"
      }, {
        "fixed" : "2.38.2"
      } ]
    } ]
  }, {
    "package" : {
      "ecosystem" : "npm",
      "name" : "n8n"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "2.0.0"
      }, {
        "fixed" : "2.37.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/security/advisories/GHSA-pf83-w3f9-8m37"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-86084"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/n8n-io/n8n"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-288" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-09-10T21:07:24Z",
    "nvd_published_at" : "2026-09-08T22:19:17Z"
  }
}