n8n before 1.123.83, 2.41.4, and 2.42.1 contains a server-side request forgery vulnerability in the Slack Trigger webhook that allows unauthenticated attackers to exfiltrate Slack tokens by bypassing signature verification when no signing secret is set. Attackers who know the webhook URL can name a file to download, causing the node to send the workspace access token to an attacker host and return the response.
Metrics
Affected Vendors & Products
References
History
Wed, 28 Oct 2026 19:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | n8n before 1.123.83, 2.41.4, and 2.42.1 contains a server-side request forgery vulnerability in the Slack Trigger webhook that allows unauthenticated attackers to exfiltrate Slack tokens by bypassing signature verification when no signing secret is set. Attackers who know the webhook URL can name a file to download, causing the node to send the workspace access token to an attacker host and return the response. | |
| Title | n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger | |
| First Time appeared |
N8n
N8n n8n |
|
| Weaknesses | CWE-918 | |
| CPEs | cpe:2.3:a:n8n:n8n:*:*:*:*:*:*:*:* | |
| Vendors & Products |
N8n
N8n n8n |
|
| References |
| |
| Metrics |
cvssV3_1
|
Status: PUBLISHED
Assigner: VulnCheck
Published: 2026-10-28T18:59:51.136Z
Updated: 2026-10-28T18:59:51.136Z
Reserved: 2026-10-28T17:28:46.441Z
Link: CVE-2026-118679
No data.
Status : Deferred
Published: 2026-10-28T19:17:34.120
Modified: 2026-10-28T19:17:34.250
Link: CVE-2026-118679
No data.