Missing Authentication for Critical Function Affecting n8n package, versions <2.27.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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- published28 Jul 2026
- disclosed22 Jul 2026
- creditUnknown
Introduced: 22 Jul 2026
NewCVE-2026-65014 (opens in a new tab)How to fix?
Upgrade n8n to version 2.27.4 or higher.
Overview
n8n is a n8n Workflow Automation Tool
Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the DELETE /${restEndpoint}/test-webhook/:id endpoint being registered before authentication middleware is applied. An attacker can disrupt active test webhook sessions by sending unauthenticated requests to cancel any user's active test webhook registration if the workflow ID is known.