Vulnerability · Published Oct 14, 2026 · Assigned by VulnCheck

CVE-2026-110853n8n before 1.123.83 Authorization Bypass via Execute Sub-workflow Inline JSON

High 7.1

In plain English

A high-severity authorization bypass via user-controlled key in n8n from n8n-io. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.2%top 86.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
n8n-io	n8n	0 – before 1.123.83

Weakness: CWE-639 · Vector: 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

References

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