n8n has an SSO Enforcement Bypass in its Self-Service Settings API

高 7.7CVE-2026-56350 · GHSA-vjf3-2gpj-233v · 30/06/2026 公開 · 02/07/2026 更新

要点

CVE-2026-56350 は n8n (n8n), n8n に影響する深刻度「高」 (CVSS 7.7) の脆弱性です。
今後30日間に悪用される確率（EPSS）：0.38%（全脆弱性の 31.9% より高い）。
対処：2.8.0 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
n8n n8n	`< 2.8.0`	`2.8.0`
n8n npm	`< 2.8.0`	`2.8.0`

概要

Impact

An authenticated user signed in through Single Sign-On (SSO) could disable SSO enforcement for their own account through the n8n API. This allowed the user to create a local password and authenticate directly with email and password, completely bypassing the organization's SSO policy, centralized identity management, and any identity-provider-enforced multi-factor authentication.

Patches

The issue has been fixed in n8n version 2.8.0. Users should upgrade to this version or later to remediate the vulnerability.

Workarounds

If upgrading is not immediately possible, administrators should consider the following temporary mitigations:

Monitor audit logs for users who create local credentials after authenticating via SSO.
Restrict the n8n instance to fully trusted users only.

These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

NVD の説明

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.