CVE-2026-72587 Instatic - Cache Poisoning via Unauthenticated Server Island Endpoint

A cache poisoning vulnerability in CoreBunch/Instatic through 0.0.14 allows an unauthenticated remote attacker to poison the shared process-wide render cache by manipulating the u query parameter of the GET /instatic/hole/ server island endpoint. The originating-page URL supplied in u seeds the...