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CVE-2026-45732— n8n: Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints

Quick assessment

Affected
n8n-io n8n
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

n8n是n8n公司开源的一个可扩展的工作流自动化工具。 n8n存在授权问题漏洞，该漏洞源于OAuth凭据重连端点仅授权读取权限而未要求更新权限，可能导致具有共享凭据只读权限的已认证用户发起OAuth重连流程，用外部账户控制的令牌覆盖存储的令牌材料，从而造成数据泄露和共享集成的持续接管。以下版本受到影响：1.123.43之前版本、2.0.0-rc.0版本至2.20.7之前版本、2.21.0版本至2.21.1之前版本。

AI Predicted 8.1 Difficulty: Moderate EPSS 0.35% · P26

Affected Version Matrix 3

VendorProduct Version RangeStatus
n8n-io n8n < 1.123.43 affected
>= 2.0.0-rc.0, < 2.20.7 affected
>= 2.21.0, < 2.21.1 affected
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I. Basic Information for CVE-2026-45732

Vulnerability Information
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Vulnerability Title
n8n: Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints
Source: CVE Program / CVE List V5
Vulnerability Description
n8n is an open source workflow automation platform. Prior to 1.123.43, 2.22.1, and 2.20.7, the OAuth1 and OAuth2 credential reconnect endpoints authorized access using credential:read rather than credential:update. An authenticated user with read-only access to a shared credential could initiate an OAuth reconnect flow and overwrite the stored token material for that credential with tokens bound to an external account they control. Workflows relying on the affected credential would subsequently execute under the attacker's OAuth identity, enabling data exfiltration to attacker-controlled external services and persistent takeover of shared integrations. This vulnerability is fixed in 1.123.43, 2.22.1, and 2.20.7.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n公司开源的一个可扩展的工作流自动化工具。 n8n存在授权问题漏洞，该漏洞源于OAuth凭据重连端点仅授权读取权限而未要求更新权限，可能导致具有共享凭据只读权限的已认证用户发起OAuth重连流程，用外部账户控制的令牌覆盖存储的令牌材料，从而造成数据泄露和共享集成的持续接管。以下版本受到影响：1.123.43之前版本、2.0.0-rc.0版本至2.20.7之前版本、2.21.0版本至2.21.1之前版本。
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

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n < 1.123.43 -

II. Public POCs for CVE-2026-45732

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III. Intelligence Information for CVE-2026-45732

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Vendor Advisories for CVE-2026-45732 (1)

Same Patch Batch · n8n-io · 2026-06-23 · 21 CVEs total

CVE-2026-54314 n8n: Denial of Service via ZIP decompression in webhook workflow
CVE-2026-44791 n8n: XML Node Prototype Pollution Patch Bypass
CVE-2026-44789 n8n: HTTP Request Node Pagination Prototype Pollution to RCE
CVE-2026-44792 n8n: Source Control Pull SQL Injection
CVE-2026-44790 n8n: Arbitrary File Read via Git Node
CVE-2026-49444 n8n: Python sandbox escape
CVE-2026-49465 n8n: Git Node Clone and Push Operations Bypass File Sandbox
CVE-2026-54304 n8n: SecurityScorecard Node Leaks API Token to User-Controlled Host
CVE-2026-54301 n8n: Same-Origin XSS in Respond to Webhook Node
CVE-2026-54310 n8n: SQL Injection in Postgres v1/TimesclaeDB Nodes
CVE-2026-54311 n8n: Merge Node SQL Mode Prototype Pollution
CVE-2026-54302 n8n: Stored XSS in Chat Trigger Node
CVE-2026-54306 n8n: Prototype Pollution enables confused-deputy execution via public webhooks
CVE-2026-54313 n8n: NoSQL Injection in MongoDB Node Find And Replace Operation
CVE-2026-54303 n8n: Reflected XSS via Facebook, WhatsApp, and Microsoft Teams Trigger Webhook Verificatio
CVE-2026-54305 n8n: Cross-Tenant Credential Takeover via Dynamic Credentials EE Endpoints
CVE-2026-54307 n8n: Credential Exfiltration via Permission Bypass
CVE-2026-54308 n8n: Missing Token Validation on Microsoft Agent 365 Trigger Node
CVE-2026-54312 n8n: Microsoft SQL Node Prototype Pollution
CVE-2026-54309 n8n: n8n MCP Browser HTTP Transport Exposes Unauthenticated Browser-Control Sessions

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-639

V. Comments for CVE-2026-45732

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