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Advisories

n8n before 2.28.0 Authentication Bypass via test-webhook

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severity
medium
date
Affecting

  • n8n >= 0, < 2.28.0

  • n8n >= 0, < 2.27.4

CWE
  • CWE-306 Missing Authentication for Critical Function
CVSS
6.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
Description
n8n before 2.28.0 (and before 2.27.4 on the 2.27.x branch) registers the DELETE /${restEndpoint}/test-webhook/:id endpoint before authentication middleware is applied, allowing any unauthenticated network caller who knows a workflow ID to cancel that workflow's active test webhook registration. The impact is limited to disrupting in-progress test sessions; production webhooks, persistent workflow state, and stored data are not affected.

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