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CVE-2026-77072— n8n before 1.123.69 Stored XSS via Form Completion Page

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 版本低于 1.123.69、2.33.4 和 2.34.1 的 Form 节点完成页面存在存储型跨站脚本（XSS）漏洞。该完成页面仅在 未设置为 时才应用沙箱化的内容安全策略（Content-Security-Policy），而 始终被渲染为原始 HTML。经过身份验证的用户可以通过表达式将 设置为 ，同时保留 的值，从而导致完成页面从 n8n 源站点提供未过滤的 HTML 和脚本。任何提交该公共表单的访问者，其浏览器都会在同源上下文中执行该脚本，从而影响其会话安全。

CVSS 8.4 · High EPSS 0.24% · P16

Affected Version Matrix 6

VendorProduct Version RangeStatus
n8n-io n8n < 1.123.69 affected
1.123.69 unaffected
2.34.0< 2.34.1 affected
2.34.1 unaffected
2.0.0< 2.33.4 affected
2.33.4 unaffected
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I. Basic Information for CVE-2026-77072

Vulnerability Information
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Vulnerability Title
n8n before 1.123.69 Stored XSS via Form Completion Page
Source: CVE Program / CVE List V5
Vulnerability Description
n8n before 1.123.69, 2.33.4, and 2.34.1 contains a stored cross-site scripting vulnerability in the Form node's completion page. The completion page applied its sandboxing Content-Security-Policy only when respondWith was not set to 'redirect', but responseText was always rendered as raw HTML. An authenticated member could set respondWith to 'redirect' via an expression while keeping responseText populated, causing the completion page to serve unsanitized HTML and script from the n8n origin. Any visitor who submitted the resulting public form would have that script execute same-origin with their session.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
n8n-io n8n 0 ~ 1.123.69 -
n8n-io n8n 2.34.0 ~ 2.34.1 -
n8n-io n8n 2.0.0 ~ 2.33.4 -

II. Public POCs for CVE-2026-77072

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III. Intelligence Information for CVE-2026-77072

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Vendor Advisories for CVE-2026-77072 (2)

Same Patch Batch · n8n-io · 2026-08-20 · 17 CVEs total

CVE-2026-77080 8.7 HIGH n8n before 1.123.69 Arbitrary File Read and Write via Snowflake
CVE-2026-77068 8.7 HIGH n8n before 2.34.1 Remote Code Execution via Path Traversal
CVE-2026-77075 8.4 HIGH n8n before 1.123.69 Expression Injection via Resource Locator
CVE-2026-77084 7.7 HIGH n8n before 1.123.69 Remote Code Execution via Git Node Configuration Values
CVE-2026-77079 7.4 HIGH n8n before 2.34.1 Authorization Bypass via Custom Role Deletion
CVE-2026-77077 7.2 HIGH n8n before 1.123.69 Remote Code Execution via EventEmitter Prototype Pollution
CVE-2026-77071 7.1 HIGH n8n before 1.123.69 PostgREST Filter Injection via Supabase
CVE-2026-77076 7.1 HIGH n8n before 1.123.69 Credential Leak via GraphQL Node Error
CVE-2026-77070 7.1 HIGH n8n before 1.123.69 NoSQL Injection via MongoDB Node
CVE-2026-77085 6.3 MEDIUM n8n before 2.34.1 SSRF Protection Bypass via SearXNG Tool
CVE-2026-77083 6.0 MEDIUM n8n before 1.123.69 Code Node Sandbox Escape via Function.prototype Pollution
CVE-2026-77074 6.0 MEDIUM n8n before 1.123.69 SSRF via Edit Image Node
CVE-2026-77073 5.3 MEDIUM n8n before 2.34.1 Cross-Project Credential Access via MCP
CVE-2026-77082 5.3 MEDIUM n8n before 1.123.69 ReDoS via Filter and Switch Node
CVE-2026-77081 5.1 MEDIUM n8n before 1.123.69 Allowed-Domains Bypass via GraphQL Node
CVE-2026-77069 2.3 LOW n8n before 1.123.69 SSRF Protection Bypass via OAuth2

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-79

V. Comments for CVE-2026-77072

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