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.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
>= 2.27.0, < 2.27.4CPE matchmatch criteria | cpe:2.3:a:n8n:n8n:*:*:*:*:community:node.js:*:* | ||
>= 2.27.0, < 2.27.4CPE matchmatch criteria | cpe:2.3:a:n8n:n8n:*:*:*:*:enterprise:node.js:*:* |
CVSS version used by this source: 4.0
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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