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CVE-2026-42228

n8n: Hijacking of Unauthenticated Chat Execution

Published: May 4, 2026Updated: May 6, 2026 Sources: CVE List NVD BDUCWE-862
NVD MITRE
6.5CVSSMEDIUM
EPSS Score
0.4%
Top 70.1%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, the /chat WebSocket endpoint used by the Chat Trigger node's Hosted Chat feature did not verify that an incoming connection was authorized to interact with the target execution. An unauthenticated remote attacker who could identify a valid execution ID for a workflow in a waiting state could attach to that execution, receive the pending prompt intended for the legitimate user, and submit arbitrary input to resume or influence downstream workflow behavior. This issue has been patched in versions 1.123.32, 2.17.4, and 2.18.1.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:LI:LA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:LConfidentiality
Low
I:LIntegrity
Low
A:NAvailability
None
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Weaknesses

CWE-862

Affected Products

n8nn8n-io
Mixed
Cloud & SaaS / saas-application
N8nСообщество свободного программного обеспечения
On-premLibrary
OSS Libraries / generic-library
n8nn8n
Mixed
Cloud & SaaS / saas-application
n8n-iocommercialDECloud & SaaSaka n8n
сообщество свободного программного обеспеченияoss-projectOperating Systemsaka сообщество свободного программного обеспечения, fsf
n8noss-projectCloud & SaaS

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://github.com/n8n-io/n8n/security/advisories/GHSA-f77h-j2v7-g6mw
github.com
https://github.com/rudSarkar/CVE-2026-42228
github.com

Timeline

Published
May 4, 2026
Last Updated
May 6, 2026

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