CVE-2026-76838 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,...