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CVE-2026-85170— n8n before 1.123.73 Local File Read and SSRF via Gmail and Brevo nodes

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.

在 n8n 1.123.73、2.35.4 和 2.36.2 之前的版本中，Gmail（v1）和 Brevo 节点在将消息内容传递给邮件编辑器时，未验证其是否为字符串类型。能够执行工作流的认证用户可以提供一个表达式，该表达式解析为包含 或 属性的对象，从而导致邮件编辑器读取 n8n 进程可访问的本地文件，或获取内部 URL（SSRF，即服务端请求伪造），并将结果附加到即将发送的消息中。

CVSS 7.1 · High

Possible ATT&CK Techniques 1 AI

T1021.002 · SMB/Windows Admin Shares

Affected Version Matrix 6

VendorProduct Version RangeStatus
n8n-io n8n < 1.123.73 affected
1.123.73 unaffected
< 2.36.2 affected
2.36.2 unaffected
< 2.35.4 affected
2.35.4 unaffected
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I. Basic Information for CVE-2026-85170

Vulnerability Information
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Vulnerability Title
n8n before 1.123.73 Local File Read and SSRF via Gmail and Brevo nodes
Source: CVE Program / CVE List V5
Vulnerability Description
n8n versions before 1.123.73, 2.35.4, and 2.36.2 pass message content in the Gmail (v1) and Brevo nodes to the mail composer without verifying it is a string. An authenticated user able to run a workflow can supply an expression that resolves to an object carrying a path or href property, causing the composer to read a local file accessible to the n8n process or fetch an internal URL (SSRF) and attach the result to the outgoing message.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
输入验证不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n 0 ~ 1.123.73 -
n8n-io n8n 0 ~ 2.36.2 -
n8n-io n8n 0 ~ 2.35.4 -

II. Public POCs for CVE-2026-85170

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III. Intelligence Information for CVE-2026-85170

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Vendor Advisories for CVE-2026-85170 (2)

Same Patch Batch · n8n-io · 2026-09-03 · 9 CVEs total

CVE-2026-85169 8.7 HIGH n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak
CVE-2026-85168 7.7 HIGH n8n before 1.123.73 Remote Code Execution via Git Node
CVE-2026-85165 7.2 HIGH n8n before 2.36.2 Expression Sandbox Bypass via SpreadElement
CVE-2026-85166 7.2 HIGH n8n before 2.36.2 Credential Exfiltration via Workflow Tool Node
CVE-2026-85171 7.1 HIGH n8n before 1.123.73 Credential Exposure via Error Logging
CVE-2026-85167 6.3 MEDIUM n8n before 2.36.2 Query Injection via Elasticsearch Firestore Nodes
CVE-2026-85172 5.3 MEDIUM n8n before 2.34.1 SSRF via Request Helper URI Validation Bypass
CVE-2026-85173 5.3 MEDIUM n8n before 2.36.2 Missing Authorization via Insights API

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-20

V. Comments for CVE-2026-85170

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