CVE-2026-56775

Description

## Impact Three mutating endpoints in the evaluation test runs controller authorized state-changing actions using `workflow:read` instead of the action-appropriate `workflow:execute` scope. An authenticated user with `project:viewer` role on a project could start new evaluation test runs, cancel in-flight runs, and delete run records for workflows they only had read access to. This issue only affects instances with Advanced Permissions (Enterprise/Cloud) where projects and viewer roles are in use. ## Patches The issue has been fixed in n8n versions 1.123.55, 2.25.7, and 2.26.2. Users should upgrade to one of these versions or later to remediate the vulnerability. ## Workarounds If upgrading is not immediately possible, administrators should consider the following temporary mitigations: - Restrict project membership to fully trusted users only. - Avoid granting viewer access to projects containing sensitive workflows. These workarounds do not fully remediate the risk and should only be used as short-term mitigation measures.

How to fix CVE-2026-56775

To remediate CVE-2026-56775, upgrade the affected package to a fixed version below.

• —upgrade to 1.123.55 or later

Is CVE-2026-56775 being exploited?

Low — EPSS is 0.2%, meaning exploitation activity has not been observed at scale.

Affected packages (1)

• from 0, < 1.123.55

CVSS scores

References (2)

• PATCHgithub.com/n8n-io/n8n
• WEBgithub.com/n8n-io/n8n/security/advisories/GHSA-664h-gpgq-h6xx