CVE-2026-118679
n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-918 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Oct 28, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
Low
Availability
None
Affected Versions
n8n-io / n8n
0 < 1.123.83
n8n-io / n8n
2.42.0 < 2.42.1
n8n-io / n8n
2.0.0 < 2.41.4