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CVE-2026-118648— n8n before 1.123.85, 2.43.5, and 2.44.1 Stored XSS via Webhook Responses Missing Sandbox Policy

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 1.123.85 之前的版本、2.x 系列中 2.43.5 之前的版本，以及 2.44.x 系列中 2.44.1 之前的版本，存在存储型跨站脚本（Stored XSS）漏洞。原因是部分 Webhook 响应路径（例如错误响应或缺少标头的响应）未包含沙箱化的内容安全策略（Content-Security-Policy）。能够创建并激活工作流的已认证成员可借此提供在 n8n 域名下执行的 HTML 内容，从而使脚本能够以访问该 Webhook URL 的用户会话身份运行。

CVSS 7.3 · High

Affected Version Matrix 6

VendorProduct Version RangeStatus
n8n-io n8n < 1.123.85 affected
1.123.85 unaffected
2.44.0< 2.44.1 affected
2.44.1 unaffected
2.0.0< 2.43.5 affected
2.43.5 unaffected
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I. Basic Information for CVE-2026-118648

Vulnerability Information
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Vulnerability Title
n8n before 1.123.85, 2.43.5, and 2.44.1 Stored XSS via Webhook Responses Missing Sandbox Policy
Source: CVE Program / CVE List V5
Vulnerability Description
n8n before 1.123.85, 2.x before 2.43.5, and 2.44.x before 2.44.1 contains a stored cross-site scripting vulnerability because some webhook response paths, such as error responses and responses without headers, omit the sandbox Content-Security-Policy. Authenticated members who can create and activate workflows can serve HTML that runs on the n8n origin, letting scripts act with the session of users who open the webhook URL.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A: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 ~ 1.123.85 -
n8n-io n8n 2.44.0 ~ 2.44.1 -
n8n-io n8n 2.0.0 ~ 2.43.5 -

II. Public POCs for CVE-2026-118648

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III. Intelligence Information for CVE-2026-118648

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Other References for CVE-2026-118648 (2)

Same Patch Batch · n8n-io · 2026-10-28 · 15 CVEs total

CVE-2026-118645 8.7 HIGH n8n before 1.123.85, 2.43.5, and 2.44.1 Filter Injection via Quick Base Node Where Paramet
CVE-2026-118649 8.3 HIGH n8n before 2.43.5 and 2.44.1 Authorization Bypass via Crafted Workflow ID in Data Tables
CVE-2026-118647 8.2 HIGH n8n before 1.123.85, 2.43.5, and 2.44.1 SeaTable Trigger API Token Exposure via Execution
CVE-2026-118643 8.2 HIGH n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Exposure via Node Execution Error Data
CVE-2026-118644 7.7 HIGH n8n before 2.41.5 and 2.42.2 Credential Theft via Error-Workflow Context Inheritance
CVE-2026-118679 7.5 HIGH n8n before 1.123.83, 2.41.4, and 2.42.1 Slack Token Exfiltration via Slack Trigger
CVE-2026-118641 7.5 HIGH n8n before 1.123.85, 2.43.5, and 2.44.1 OData $filter Injection via Outlook and SharePoint
CVE-2026-118675 7.1 HIGH n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Guard Bypass via Execute Sub-workflow
CVE-2026-118676 7.1 HIGH n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Permission Check Bypass
CVE-2026-118642 7.1 HIGH n8n before 1.123.85, 2.43.5, and 2.44.1 Credential Permission Check Bypass via Inline Sub-
CVE-2026-118678 7.1 HIGH n8n before 2.41.4 and 2.42.1 Prototype Pollution DoS via Workflow History Compaction
CVE-2026-118646 6.5 MEDIUM n8n before 1.123.85, 2.43.5, and 2.44.1 ReDoS via Read/Write Files Node
CVE-2026-118677 5.9 MEDIUM n8n before 2.41.4 and 2.42.1 Local Gateway Deep-Link Silent Re-pairing to Attacker Instanc
CVE-2026-118640 5.4 MEDIUM n8n before 1.123.85, 2.43.5, and 2.44.1 Chat Hub Authorization Bypass

IV. Related Vulnerabilities

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