CVE-2026-56350: n8n - SSO Enforcement Bypass via API

Severity: high (CVSS 7.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-06-30 · updated 2026-07-02
Weakness: CWE-285

Description

n8n before 2.8.0 contains an authentication bypass vulnerability allowing authenticated SSO users to disable SSO enforcement through the API. Attackers can create local password credentials to authenticate directly, bypassing organizational SSO policies and identity-provider-enforced multi-factor authentication.

Affected products

n8n-io n8n: before 2.8.0 — fixed in 2.8.0

How to fix

Upgrade to a fixed version: n8n-io n8n 2.8.0. Check the vendor advisory for mitigations.

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-vjf3-2gpj-233v
https://www.vulncheck.com/advisories/n8n-sso-enforcement-bypass-via-api

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