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CVE-2026-85167— n8n before 2.36.2 Query Injection via Elasticsearch Firestore Nodes

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公司开源的一款支持持续集成与交付的工作流自动化工具。 n8n 2.35.4之前版本和2.36.2版本之前的2.36.x版本存在输入验证错误漏洞，该漏洞源于Elasticsearch Document Get All和Google Cloud Firestore Document Query操作在解析前将表达式值直接插入JSON查询字符串，可能导致查询注入，攻击者可利用包含引号和花括号的字符关闭预期字段并引入新的查询运算符，将单文档查询变为全集合读取，造成敏感信息泄露。

CVSS 6.3 · Medium EPSS 0.40% · P33

Affected Version Matrix 4

VendorProduct Version RangeStatus
n8n-io n8n < 2.36.2 affected
2.36.2 unaffected
< 2.35.4 affected
2.35.4 unaffected
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I. Basic Information for CVE-2026-85167

Vulnerability Information
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Vulnerability Title
n8n before 2.36.2 Query Injection via Elasticsearch Firestore Nodes
Source: CVE Program / CVE List V5
Vulnerability Description
n8n before 2.35.4 and 2.36.x before 2.36.2 contain a query injection vulnerability in the Elasticsearch Document Get All and Google Cloud Firestore Document Query operations, which build their JSON query by interpolating expression values directly into the query string before parsing. A value containing quote and brace characters can close the intended field and introduce new query operators, turning an intended single-document lookup into a full-collection read.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
数据查询逻辑中特殊元素的不当中和
Source: CVE Program / CVE List V5
Vulnerability Title
n8n 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
n8n是n8n公司开源的一款支持持续集成与交付的工作流自动化工具。 n8n 2.35.4之前版本和2.36.2版本之前的2.36.x版本存在输入验证错误漏洞，该漏洞源于Elasticsearch Document Get All和Google Cloud Firestore Document Query操作在解析前将表达式值直接插入JSON查询字符串，可能导致查询注入，攻击者可利用包含引号和花括号的字符关闭预期字段并引入新的查询运算符，将单文档查询变为全集合读取，造成敏感信息泄露。
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 0 ~ 2.36.2 -
n8n-io n8n 0 ~ 2.35.4 -

II. Public POCs for CVE-2026-85167

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III. Intelligence Information for CVE-2026-85167

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Vendor Advisories for CVE-2026-85167 (2)

Same Patch Batch · n8n-io · 2026-09-03 · 9 CVEs total

CVE-2026-85169 8.7 HIGH n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak
CVE-2026-85168 7.7 HIGH n8n before 1.123.73 Remote Code Execution via Git Node
CVE-2026-85165 7.2 HIGH n8n before 2.36.2 Expression Sandbox Bypass via SpreadElement
CVE-2026-85166 7.2 HIGH n8n before 2.36.2 Credential Exfiltration via Workflow Tool Node
CVE-2026-85171 7.1 HIGH n8n before 1.123.73 Credential Exposure via Error Logging
CVE-2026-85170 7.1 HIGH n8n before 1.123.73 Local File Read and SSRF via Gmail and Brevo nodes
CVE-2026-85172 5.3 MEDIUM n8n before 2.34.1 SSRF via Request Helper URI Validation Bypass
CVE-2026-85173 5.3 MEDIUM n8n before 2.36.2 Missing Authorization via Insights API

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-943

V. Comments for CVE-2026-85167

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