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CVE-2026-118640— n8n before 1.123.85, 2.43.5, and 2.44.1 Chat Hub Authorization Bypass

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 在版本 1.123.85 之前、2.43.5 之前以及 2.44.1 之前的版本中，其 Chat Hub 组件存在一个授权绕过漏洞。该漏洞允许仅具备聊天功能的用户注册受限制的工具类型。拥有 角色的用户可以通过聊天界面添加并运行工具，从而执行沙盒代码、访问允许的文件，以及使用实例工作流、数据表（Data Tables）和代理（agents）。

CVSS 5.4 · Medium

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-2026-118640

Vulnerability Information
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Vulnerability Title
n8n before 1.123.85, 2.43.5, and 2.44.1 Chat Hub Authorization Bypass
Source: CVE Program / CVE List V5
Vulnerability Description
n8n before 1.123.85, 2.43.5, and 2.44.1 contains an authorization bypass vulnerability in Chat Hub that allows chat-only users to register restricted tool types. Users with the global:chatUser role can add and run tools through chat to execute sandboxed code, access permitted files, and use instance workflows, Data Tables, and agents.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
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-2026-118640

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2026-118640

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Other References for CVE-2026-118640 (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-2026-118648 7.3 HIGH n8n before 1.123.85, 2.43.5, and 2.44.1 Stored XSS via Webhook Responses Missing Sandbox P
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

IV. Related Vulnerabilities

Same product: n8n
Same vendor: n8n-io
Same weakness: CWE-863