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CVE-2026-118677— n8n before 2.41.4 and 2.42.1 Local Gateway Deep-Link Silent Re-pairing to Attacker Instance

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.

在版本 2.41.4 之前以及 2.42.x 系列中 2.42.1 之前的 n8n，其本地网关（Local Gateway）桌面应用存在一个缺少确认机制的漏洞。该漏洞使得深链接（deep-link）连接处理器能够在未获用户明确确认的情况下，静默地将应用与另一个 n8n 实例重新配对。攻击者可诱使正在运行本地网关的用户打开精心构造的链接，从而将用户的计算机连接到由攻击者控制的 n8n 实例。一旦连接成功，该实例即可继承用户此前已授予的权限，并通过网关对用户的计算机执行操作。

CVSS 5.9 · Medium Updated Oct 29, 2026

Possible ATT&CK Techniques 2 AI

T1055 · Process Injection T1566.002 · Spearphishing Link

Affected Version Matrix 4

Vendor	Product	Version Range	Status
n8n-io	n8n	`2.42.0< 2.42.1`	affected
		`2.42.1`	unaffected
		`< 2.41.4`	affected
		`2.41.4`	unaffected

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Vulnerability Information

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Vulnerability Title

n8n before 2.41.4 and 2.42.1 Local Gateway Deep-Link Silent Re-pairing to Attacker Instance

Source: CVE Program / CVE List V5

Vulnerability Description

n8n before 2.41.4 and 2.42.x before 2.42.1 contains a missing confirmation vulnerability in the Local Gateway desktop app that allows its deep-link connect handler to silently re-pair the app with a different n8n instance. Attackers can lure users running the Local Gateway into opening a crafted n8n-computer-use:// link to connect their computer to an attacker-controlled instance, inheriting previously granted permissions and acting on the computer through the gateway.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

自定义URL方案处理程序中的授权不正确

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
n8n-io	n8n	2.42.0 ~ 2.42.1	-
n8n-io	n8n	0 ~ 2.41.4	-

II. Public POCs for CVE-2026-118677

#	POC Description	Source Link	Shenlong Link

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No public POC found.

III. Intelligence Information for CVE-2026-118677

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Other References for CVE-2026-118677 (2)

https://github.com/n8n-io/n8n/security/advisories/GHSA-cwm2-vhf5-27q9 vendor-advisory
https://www.vulncheck.com/advisories/n8n-before-2.41.4-and-2.42.1-local-gateway-deep-link-silent-re-pairing-to-attacker-instance third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-118677

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-2026-118640	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-939