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CVE-2026-33720— n8n Has Authorization Bypass in OAuth Callback via N8N_SKIP_AUTH_ON_OAUTH_CALLBACK

EPSS 0.01% · P2
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I. Basic Information for CVE-2026-33720

Vulnerability Information
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Vulnerability Title
n8n Has Authorization Bypass in OAuth Callback via N8N_SKIP_AUTH_ON_OAUTH_CALLBACK
Source: NVD (National Vulnerability Database)
Vulnerability Description
n8n is an open source workflow automation platform. Prior to version 2.8.0, when the `N8N_SKIP_AUTH_ON_OAUTH_CALLBACK` environment variable is set to `true`, the OAuth callback handler skips ownership verification of the OAuth state parameter. This allows an attacker to trick a victim into completing an OAuth flow against a credential object the attacker controls, causing the victim's OAuth tokens to be stored in the attacker's credential. The attacker can then use those tokens to execute workflows in their name. This issue only affects instances where `N8N_SKIP_AUTH_ON_OAUTH_CALLBACK=true` is explicitly configured (non-default). The issue has been fixed in n8n version 2.8.0. Users should upgrade to this version or later to remediate the vulnerability. If upgrading is not immediately possible, administrators should consider the following temporary mitigations: Avoid enabling `N8N_SKIP_AUTH_ON_OAUTH_CALLBACK=true` unless strictly required, and/ or restrict access to 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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)
Vulnerability Title
n8n 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 2.8.0之前版本存在安全漏洞，该漏洞源于OAuth回调处理程序跳过状态参数所有权验证，可能导致OAuth令牌被盗。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
n8n-ion8n < 2.8.0 -

II. Public POCs for CVE-2026-33720

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III. Intelligence Information for CVE-2026-33720

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Same Patch Batch · n8n-io · 2026-03-25 · 11 CVEs total

CVE-2026-27496n8n has In-Process Memory Disclosure in its Task Runner
CVE-2026-33660n8n Has Multiple Remote Code Execution Vulnerabilities in Merge Node AlaSQL SQL Mode
CVE-2026-33663n8n Vulnerable to Credential Theft via Name-Based Resolution and Permission Checker Bypass
CVE-2026-33665n8n: LDAP Email-Based Account Linking Allows Privilege Escalation and Account Takeover
CVE-2026-33696n8n Vulnerable to Prototype Pollution in XML & GSuiteAdmin node parameters lead to RCE
CVE-2026-33713n8n Vulnerable to SQL Injection in Data Table Node via orderByColumn Expression
CVE-2026-33722n8n Has External Secrets Authorization Bypass in Credential Saving
CVE-2026-33724n8n's Source Control SSH Configuration Uses StrictHostKeyChecking=no
CVE-2026-33749n8n Vulnerable to XSS via Binary Data Inline HTML Rendering
CVE-2026-33751n8n Vulnerable to LDAP Filter Injection in LDAP Node

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-863

V. Comments for CVE-2026-33720

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