What’s Vulnerable › Vulnerabilities

CVE-2026-56778: n8n - Authorization Bypass in Public API Execution Retry Endpoint

• Severity: medium (CVSS 6.4 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-08 · updated 2026-10-29
• Weakness: CWE-863

Description

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 products

• n8n-io n8n: before 2.25.7; from 2.26.0 before 2.26.2 — fixed in 2.25.7, 2.26.2
• n8n-io n8n: from 2.26.0 before 2.26.2 — fixed in 2.26.2

How to fix

Upgrade to a fixed version: n8n-io n8n 2.25.7, 2.26.2; n8n-io n8n 2.26.2. Check the vendor advisory for mitigations.

References

• https://github.com/n8n-io/n8n/security/advisories/GHSA-h3jj-5f3v-3685
• https://www.vulncheck.com/advisories/n8n-authorization-bypass-in-public-api-execution-retry-endpoint

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