CVE-2026-85170

Medium

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.

SeverityMedium

CVSS6.5

Exploit probability—

Product

N8n

PublishedSep 3, 2026

First seenSep 3, 2026

Weakness typeCWE-20Improper input validation

How to fix

Update

n8n n8n1.123.73, 2.35.4, 2.36.2 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-95ph-833c-4wrp

Affected products

Product	Affected versions	Fixed in
n8n n8n	v < 1.123.73, 2.0.0 ≤ v < 2.35.4, 2.36.0 ≤ v < 2.36.2	1.123.73, 2.35.4, 2.36.2

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