EspoCRM <= 9.3.3 - Server-Side Request Forgery

EspoCRM = 9.3.3 contains an authenticated server-side request forgery caused by improper internal-host validation using alternative IPv4 formats in HostCheck::isNotInternalHost, letting authenticated users access internal resources via /api/v1/Attachment/fromImageUrl endpoint. id: CVE-2026-33534...