Hi.Events before 1.11.1-beta Server-Side Request Forgery via Unvalidated Webhook Redirects
Hi.Events validates a webhook destination only when it is registered, never when it is used. NoInternalUrlRule in backend/app/Validators/Rules/NoInternalUrlRule.php resolves the hostname with gethostbyname() and rejects private and reserved ranges, which any public hostname passes. At dispatch, WebhookDispatchService t…
Severity high: primary CNA CVSS 8.4 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-08-24T17:36:02.928Z. Updated 2026-08-29T11:47:50.490Z.