CVE-2026-118677

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

State: Published
Severity: 5.9 Medium
Published: Oct 28, 2026
Updated: Oct 28, 2026
Reserved: Oct 28, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.9 Medium	CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:L/VA:N/SC:L/SI:L/SA:N	VulnCheck
3.1	5.9 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N	VulnCheck

Weaknesses

CWE-939 Improper Authorization in Handler for Custom URL Scheme

Affected Products

Product	Versions
n8nn8n-io	2.42.0 to before 2.42.1Affected 2.42.1Not affected
n8nn8n-io	before 2.41.4Affected 2.41.4Not affected

References

GitHub Security Advisory (GHSA-cwm2-vhf5-27q9)vendor-advisory
VulnCheck Advisory: n8n before 2.41.4 and 2.42.1 Local Gateway Deep-Link Silent Re-pairing to Attacker Instancethird-party-advisory

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