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Advisories

n8n before 1.123.73 Local File Read and SSRF via Gmail and Brevo nodes

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severity
high
date
Affecting

  • n8n >= 0, < 1.123.73

  • n8n >= 0, < 2.36.2

  • n8n >= 0, < 2.35.4

CWE
  • CWE-20 Improper Input Validation
CVSS
7.1
CVSS V4 Vector
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
Credit
pawbednarz
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.

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