CVE-2026-118640

n8n before 1.123.85, 2.43.5, and 2.44.1 Chat Hub Authorization Bypass

State: Published
Severity: 5.3 Medium
Published: Oct 28, 2026
Updated: Oct 28, 2026
Reserved: Oct 28, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	5.3 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N	VulnCheck
3.1	5.4 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N	VulnCheck

Weaknesses

CWE-863 Incorrect Authorization

Affected Products

Product	Versions
n8nn8n-io	before 1.123.85Affected 1.123.85Not affected
n8nn8n-io	2.44.0 to before 2.44.1Affected 2.44.1Not affected
n8nn8n-io	2.0.0 to before 2.43.5Affected 2.43.5Not affected

References

GitHub Security Advisory (GHSA-43v8-hjhm-chjp)vendor-advisory
VulnCheck Advisory: n8n before 1.123.85, 2.43.5, and 2.44.1 Chat Hub Authorization Bypassthird-party-advisory

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