CVE-2026-56778: n8n - Authorization Bypass in Public API Execution Retry Endpoint
n8n before 2.25.7 and 2.26.x before 2.26.2 contains an authorization bypass in the Public API execution retry endpoint, which authorizes access using the workflow:read scope instead of workflow:execute. An authenticated user with read-only access to a shared workflow can use the Public API to retry executions of that workflow, bypassing the intended permission boundary between read and execute access. This affects instances where workflows are shared with other users or across projects.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-56778?
The CVE-2026-56778 vulnerability has a medium severity rating of 6.4.
How do I fix CVE-2026-56778?
To fix CVE-2026-56778, upgrade your n8n installation to version 2.25.7 or higher, or 2.26.2 and above.
What does CVE-2026-56778 affect?
CVE-2026-56778 affects n8n versions prior to 2.25.7 and 2.26.x before 2.26.2.
What type of vulnerability is CVE-2026-56778?
CVE-2026-56778 is an authorization bypass vulnerability in the Public API execution retry endpoint of n8n.
Who is impacted by CVE-2026-56778?
Authenticated users with read-only access to a shared workflow are impacted by CVE-2026-56778 as they can exploit it to retry executions through the Public API.