CVE-2026-85170: n8n

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• n8n n8n: before 1.123.73 (fixed in 1.123.73); from 2.0.0, before 2.35.4 (fixed in 2.35.4); from 2.36.0, before 2.36.2 (fixed in 2.36.2)

Published 2026-09-03. Last modified 2026-09-18.