CVE-2026-110853

n8n before 1.123.83 Authorization Bypass via Execute Sub-workflow Inline JSON

State: Published
Severity: 7.1 High
Published: Oct 14, 2026
Updated: Oct 16, 2026
Reserved: Oct 14, 2026

Description

n8n before 1.123.83 contains an authorization bypass vulnerability that allows authenticated members to spoof workflow identity by supplying a trusted identifier in Execute Sub-workflow inline JSON mode. Attackers can set this identifier to resolve credentials from projects they do not belong to and modify another workflow's static data and error-workflow dispatch.

Scores

CVSS	Score	Vector	Source
4.0	7.1 High	CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N	VulnCheck

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key

Affected Products

Product	Versions
n8nn8n-io	before 1.123.83Affected

References

GitHub Security Advisory (GHSA-866p-xg8v-g2q7)vendor-advisory
VulnCheck Advisory: n8n before 1.123.83 Authorization Bypass via Execute Sub-workflow Inline JSONthird-party-advisory

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