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CVE-2026-85169— n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak

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 在 1.123.73、2.35.4 和 2.36.2 之前的版本中， 处理器存在表达式沙箱逃逸漏洞。 在解析调用方提供的占位符名称时，未强制要求该名称必须是对象自身的属性（own property），并允许使用保留关键字；当输入为原始类型（primitive）时，它会返回一个指向宿主对象原型的实时引用。拥有工作流构建权限的攻击者可以通过遍历原型链找到 构造器，从而在 n8n 主进程中编译并执行任意代码，最终导致远程代码执行（RCE）。

CVSS 8.7 · High

Affected Version Matrix 6

VendorProduct Version RangeStatus
n8n-io n8n < 1.123.73 affected
1.123.73 unaffected
< 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-2026-85169

Vulnerability Information
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Vulnerability Title
n8n before 1.123.73 Remote Code Execution via $fromAI Prototype Leak
Source: CVE Program / CVE List V5
Vulnerability Description
n8n versions before 1.123.73, 2.35.4, and 2.36.2 contain an expression sandbox escape in the $fromAI handler. $fromAI resolved a caller-supplied placeholder name without requiring it to be an own property and admitted reserved keys; against a primitive input value it returned a live host-prototype reference. An attacker with workflow-build privilege can walk the prototype chain to the Function constructor and compile/execute arbitrary code in the main n8n process, leading to remote code execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n 0 ~ 1.123.73 -
n8n-io n8n 0 ~ 2.36.2 -
n8n-io n8n 0 ~ 2.35.4 -

II. Public POCs for CVE-2026-85169

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III. Intelligence Information for CVE-2026-85169

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Vendor Advisories for CVE-2026-85169 (2)

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

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-2026-85167 6.3 MEDIUM n8n before 2.36.2 Query Injection via Elasticsearch Firestore 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-94

V. Comments for CVE-2026-85169

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