CVE-2026-126389
n8n before 1.123.89 Authentication Bypass via Chat Trigger Embedded Chat
CVSS Score
5.4
EPSS Score
0.0%
EPSS Percentile
0th
n8n before 1.123.89 contains an authentication bypass vulnerability in the Chat Trigger that allows unauthenticated attackers to skip n8n User Auth through the setup GET webhook route in embedded chat mode. Attackers can send unauthenticated GET requests to the chat webhook URL to read named session conversation history or trigger workflows with attacker-supplied input.
| CWE | CWE-288 |
| Vendor | n8n-io |
| Product | n8n |
| Published | Nov 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
n8n-io / n8n
0 < 1.123.89
n8n-io / n8n
2.46.0 < 2.46.1
n8n-io / n8n
2.0.0 < 2.45.5
n8n-io / n8n
3.0.0 < 3.0.1
References
Credits
🔍 Masofgon