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CVE-2026-42228— n8n: Hijacking of Unauthenticated Chat Execution

Quick assessment

Affected
n8n-io n8n
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 1.123.32之前版本、2.17.4之前版本和2.18.1之前版本存在安全漏洞，该漏洞源于Chat Trigger节点Hosted Chat功能的/chat WebSocket端点未验证传入连接是否授权与目标执行交互，可能导致未经身份验证的远程攻击者识别有效执行ID后附加到该执行，接收待处理提示并提交任意输入以恢复或影响下游工作流行为。

AI Predicted 8.1 Difficulty: Easy EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1133 · External Remote Services

Affected Version Matrix 3

VendorProduct Version RangeStatus
n8n-io n8n < 1.123.32 affected
>= 2.17.0, < 2.17.4 affected
>= 2.18.0, < 2.18.1 affected
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I. Basic Information for CVE-2026-42228

Vulnerability Information
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Vulnerability Title
n8n: Hijacking of Unauthenticated Chat Execution
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n开源的一个可扩展的工作流自动化工具。 n8n 1.123.32之前版本、2.17.4之前版本和2.18.1之前版本存在安全漏洞，该漏洞源于Chat Trigger节点Hosted Chat功能的/chat WebSocket端点未验证传入连接是否授权与目标执行交互，可能导致未经身份验证的远程攻击者识别有效执行ID后附加到该执行，接收待处理提示并提交任意输入以恢复或影响下游工作流行为。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n < 1.123.32 -

II. Public POCs for CVE-2026-42228

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III. Intelligence Information for CVE-2026-42228

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Vendor Advisories for CVE-2026-42228 (1)

Same Patch Batch · n8n-io · 2026-05-04 · 12 CVEs total

CVE-2026-42232 n8n: XML Node Prototype Pollution to RCE
CVE-2026-42233 n8n: SQL Injection in Oracle Database Node via Limit Field
CVE-2026-42229 n8n: SQL Injection in SeaTable Node
CVE-2026-42235 n8n: XSS via MCP OAuth client
CVE-2026-42236 n8n: Unauthenticated Denial of Service via MCP Client Registration
CVE-2026-42237 n8n: SQL Injection in Snowflake and MySQL Nodes
CVE-2026-42226 n8n: Credential Authorization Bypass in dynamic-node-parameters Allows Foreign API Key Rep
CVE-2026-42230 n8n: Open Redirect in MCP OAuth Consent Flow
CVE-2026-42234 n8n: Python Task Runner Sandbox Escape
CVE-2026-42227 n8n: Public API Variables IDOR Allows Cross-Project Secret Disclosure
CVE-2026-42231 n8n: Prototype Pollution in XML Webhook Body Parser Leads to RCE

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-862

V. Comments for CVE-2026-42228

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