CVE-2026-103260

Medium

Description

n8n versions before 2.39.6 and 2.40.0 before 2.40.1 contain an approval bypass vulnerability in the Send and Wait node's Approve Within Chat mode. Attackers can submit resume requests without verification of the requester's identity or approval permissions, allowing unauthenticated users to advance waiting executions and trigger guarded actions.

SeverityMedium

CVSS4.0

Exploit probability—

ProductN8n

PublishedOct 1, 2026

First seenOct 1, 2026

Weakness typeCWE-862Missing authorization

How to fix

Update

n8n-io n8n2.39.6, 2.40.1 or later

Vendor advisories

github.com/n8n-io/n8n/security/advisories/GHSA-342v-gmh6-738j

Affected products

Product	Affected versions	Fixed in
n8n-io n8n	v < 2.39.6, 2.40.0 ≤ v < 2.40.1	2.39.6, 2.40.1

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