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CVE-2026-59208— n8n: Cross-Issuer Token Exchange Account Binding via Subject-Only Identity Resolution

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 2.27.4之前版本和2.28.0版本至2.28.1之前版本存在安全漏洞，该漏洞源于在处理多个受信任的令牌交换发行者时，仅使用JWT sub声明解析外部身份并忽略iss声明，可能导致具有一个受信任发行者有效令牌的攻击者，利用匹配另一个发行者下受害者的sub进行身份验证。

AI Predicted 8.6 Difficulty: Easy EPSS 0.27% · P18

Possible ATT&CK Techniques 1 AI

T1078.004 · Cloud Accounts

Affected Version Matrix 2

VendorProduct Version RangeStatus
n8n-io n8n >= 2.28.0, < 2.28.1 affected
< 2.27.4 affected
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I. Basic Information for CVE-2026-59208

Vulnerability Information
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Vulnerability Title
n8n: Cross-Issuer Token Exchange Account Binding via Subject-Only Identity Resolution
Source: CVE Program / CVE List V5
Vulnerability Description
n8n is an open source workflow automation platform. Prior to 2.27.4 and from 2.28.0 prior to 2.28.1, n8n instances configured with more than one trusted token-exchange issuer resolved external identities to local accounts using only the JWT sub claim and ignored the iss claim, allowing an attacker with a valid token from one trusted issuer and a sub matching a victim under another issuer to authenticate as that victim. This issue is fixed in versions 2.27.4 and 2.28.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
认证机制不恰当
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 2.27.4之前版本和2.28.0版本至2.28.1之前版本存在安全漏洞，该漏洞源于在处理多个受信任的令牌交换发行者时，仅使用JWT sub声明解析外部身份并忽略iss声明，可能导致具有一个受信任发行者有效令牌的攻击者，利用匹配另一个发行者下受害者的sub进行身份验证。
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 >= 2.28.0, < 2.28.1 -

II. Public POCs for CVE-2026-59208

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III. Intelligence Information for CVE-2026-59208

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Patches & Fixes for CVE-2026-59208 (1)

Vendor Advisories for CVE-2026-59208 (1)

Vendor Pages for CVE-2026-59208 (1)

Same Patch Batch · n8n-io · 2026-07-09 · 4 CVEs total

CVE-2026-59207 n8n: "Allowed HTTP Request Domains" Restriction Bypass via AI Agents MCP Connector
CVE-2026-59206 n8n: Prototype Pollution via Workflow Credentials Leads to Unauthenticated User and Projec
CVE-2026-59209 n8n: Shared Credential Header Leak via HTTP Request Pagination Expression

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-287