CVE-2026-56775: n8n

Medium severity, CVSS 5.4. EPSS: 0.3% chance of exploitation in the next 30 days.

n8n before 1.123.55, 2.25.7, and 2.26.2 contains an authorization vulnerability in three mutating evaluation test-run endpoints that authorize state-changing actions using the workflow:read scope instead of the action-appropriate workflow:execute scope. On instances using Advanced Permissions (Enterprise/Cloud) with projects and viewer roles, an authenticated user with the project:viewer role can start new evaluation test runs, cancel in-flight runs, and delete run records for workflows they only have read access to.

Affected products

• n8n n8n: before 1.123.55 (fixed in 1.123.55); from 2.0.0, before 2.25.7 (fixed in 2.25.7); from 2.26.0, before 2.26.2 (fixed in 2.26.2)

Published 2026-07-08. Last modified 2026-07-08.