Vulnerability · Published Sep 8, 2026 · Assigned by GitHub_M

CVE-2026-86084n8n: Disabled OIDC SSO Endpoints Remain Active and Issue Valid Sessions

Medium 6.0

In plain English

A medium-severity authentication bypass in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.0Medium

Exploit odds (30 days)0.5%top 59.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	n8n	1.123.76	GHSA-pf83-w3f9-8m37
npm	n8n	2.38.2	GHSA-pf83-w3f9-8m37
npm	n8n	2.37.7	GHSA-pf83-w3f9-8m37

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	>= 2.38.0, < 2.38.2>= 2.0.0, < 2.37.7< 1.123.76

Weakness: CWE-288 · Vector: 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

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-pf83-w3f9-8m37 x_refsource_CONFIRM
https://github.com/n8n-io/n8n/releases/tag/n8n@1.123.76 x_refsource_MISC
https://github.com/n8n-io/n8n/releases/tag/n8n@2.37.7 x_refsource_MISC
https://github.com/n8n-io/n8n/releases/tag/n8n@2.38.2 x_refsource_MISC