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CVE-2026-42228

n8n: Hijacking of Unauthenticated Chat Execution

MEDIUM
6.5
CVSS Score
Published: May 4, 2026 at 06:27 PM UTC
Updated: June 17, 2026 at 10:47 AM UTC
2 products affected across 2 vendorsN8NN8N

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

N8N· N8Nnpm
95%
v < 1.123.322.17.0 ≤ v < 2.17.42.18.0
N8N· N8N Io
60%
v < 1.123.32v < 2.17.4v < 2.18.1
Affected range stops below 1.123.32, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.17.4, so it looks safe — our inference, not a vendor statement
Affected range stops below 2.18.1, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

x_refsource_CONFIRMVendor Advisory
Source: cverecord
https://github.com/n8n-io/n8n/security/advisories/GHSA-f77h-j2v7-g6mw

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-862

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