CVSS 4.0
6.3 mediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:NCVE-2026-126389 n8n before 1.123.89 Authentication Bypass via Chat Trigger Embedded Chat
Medium (6.3) in n8n-io n8n. EPSS 0.4% estimated probability of exploitation activity in the next 30 days.
On this page
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.
Severity
CVSS 3.1
5.4 mediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N- EPSS
- 0.4% estimated probability of exploitation activity in the next 30 days; 29th percentile. Scored 2026-11-13. A forecast for this CVE across the internet, not for your own systems.
- CWE
- CWE-288 Authentication Bypass Using an Alternate Path or Channel
- OWASP Top 10
- A07:2025 Authentication Failures
- Published
- Modified
- Assigned by
- VulnCheck (CNA)
- NVD analysis
- Deferred: the NVD does not plan to analyze it
- Record from
- the NVD, synced
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Affected
Versions
From the CNA's record in the CVE List.
| Product | Affected |
|---|---|
| n8n-io n8n | before 1.123.89 |
| n8n-io n8n | from 2.46.0 before 2.46.1 |
| n8n-io n8n | from 2.0.0 before 2.45.5 |
| n8n-io n8n | from 3.0.0 before 3.0.1 |
Attack patterns (CAPEC)
- CAPEC-127 Directory Indexing Likelihood: High · Severity: Medium
- CAPEC-665 Exploitation of Thunderbolt Protection Flaws Likelihood: Low · Severity: Very High
The attack patterns MITRE's CAPEC relates to this record's weaknesses, as MITRE names them. Credits.
History
- The NVD deferred its analysis
Changes since this site first stored the record. The same for every record: /api/public/changes.