CVE-2026-126389

n8n before 1.123.89 Authentication Bypass via Chat Trigger Embedded Chat

Published Nov 13, 2026 CVSS 4.0 · 6.3 Medium EPSS n/a KEV · Not listed

Description

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.

Analysis

No analysis available yet

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

n8n-io

n8n

unaffected

Version	Status	Constraints
`0`	affected	< 1.123.89
`1.123.89`	unaffected	—

n8n-io

n8n

unaffected

Version	Status	Constraints
`2.46.0`	affected	< 2.46.1
`2.46.1`	unaffected	—

n8n-io

n8n

unaffected

Version	Status	Constraints
`2.0.0`	affected	< 2.45.5
`2.45.5`	unaffected	—

n8n-io

n8n

unaffected

Version	Status	Constraints
`3.0.0`	affected	< 3.0.1
`3.0.1`	unaffected	—

No data.

No data available yet.

Remediation

No remediation available yet

Tracking

Advisories

No advisories available

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact Low

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact Low

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Changed

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://github.com/n8n-io/n8n/security/advisories/GHSA-pwj5-wwm6-g83j
https://www.vulncheck.com/advisories/n8n-before-1.123.89-authentication-bypass-via-chat-trigger-embedded-chat

History

Nov 13, 2026 9:45 AM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
Description		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.
Title		n8n before 1.123.89 Authentication Bypass via Chat Trigger Embedded Chat
First Time appeared		N8n N8n n8n
Weaknesses		CWE-288
CPEs		cpe:2.3:a:n8n:n8n::::::::
Vendors & Products		N8n N8n n8n
References		https://github.com/n8n-io/n8n/security/advisories/GHSA-pwj5-wwm6-g83j https://www.vulncheck.com/advisories/n8n-before-1.123.89-authentication-bypass-via-chat-trigger-embedded-chat
Metrics		cvssV3_1 `{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'}` cvssV4_0 `{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:L/SA:N'}`