All vulnerabilities
CVE-2026-118679GHSA-3c3p-5959-3ghr

n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger

n8n-io n8nFrameworks
Open in ThreatlineRecord JSON
CVSS
6.9Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in1.123.83Also 2.42.1, 2.41.4CVE List
Published28 Oct 2026Updated 28 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 6

  • n8naffected: all versions before 1.123.83CVE List
  • n8nunaffected: 1.123.83CVE List
  • n8naffected: 2.42.0 before 2.42.1CVE List
  • n8nunaffected: 2.42.1CVE List
  • n8naffected: 2.0.0 before 2.41.4CVE List
  • n8nunaffected: 2.41.4CVE List

References 2