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Medium, CVSS 6.0amended

n8n: Disabled OIDC SSO Endpoints Remain Active and Issue Valid Sessions

CVE-2026-86084GHSA-pf83-w3f9-8m37

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (n8n 2.38.2, 2.37.7, 1.123.76), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • npm n8n

    Affected
    < 1.123.76>= 2.38.0, < 2.38.2>= 2.0.0, < 2.37.7
    Fixed in
    2.37.7, 1.123.76, 2.38.2

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS 4.0
6.0 · 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 · score source
EPSS
  • CVE-2026-86084: 0.46% estimated exploitation activity in the next 30 days; percentile 39.99 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

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…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 4 · amended ·

    Amended from ghsa record GHSA-pf83-w3f9-8m37

  2. Revision 3 · amended ·

    Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

  3. Revision 2 · amended ·

    Amended from osv record GHSA-pf83-w3f9-8m37

  4. Revision 1 · created ·

    Published from ghsa record GHSA-pf83-w3f9-8m37

Agent brief

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# Patch Next advisory brief: CVE-2026-86084

Advisory: n8n: Disabled OIDC SSO Endpoints Remain Active and Issue Valid Sessions
IDs: CVE-2026-86084, GHSA-pf83-w3f9-8m37
Record: https://patchnext.com/advisories/cve-2026-86084 (revision 4, source checked 26 Oct 2026, 13:02 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.0)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: n8n 2.38.2, 2.37.7, 1.123.76. A vendor fix does not mean a deployment is fixed.

## Affected components
- npm n8n: affected < 1.123.76; >= 2.38.0, < 2.38.2; >= 2.0.0, < 2.37.7; fixed in 2.37.7, 1.123.76, 2.38.2

## Suggested inspection (read-only)
- `npm ls n8n --all`: lists every installed copy and version, including transitive ones. Run in the project root after `npm ci`.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on n8n.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-pf83-w3f9-8m37 (GitHub-reviewed advisory GHSA-pf83-w3f9-8m37 lists affected ranges: npm n8n >=0 =2.38.0 =2.0.0 <2.37.7)
- Verified: https://osv.dev/vulnerability/GHSA-pf83-w3f9-8m37 (OSV record GHSA-pf83-w3f9-8m37 lists affected ranges: npm n8n >=0 =2.38.0 =2.0.0 <2.37.7 (fixed))

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