CVE-2026-72784 Craft CMS 5.0.0-RC1 before 5.10.6 SSRF via GraphQL asset mutation

Craft CMS versions = 5.0.0-RC1 before 5.10.6 and = 4.0.0-RC1 before 4.18.2 contain a server-side request forgery vulnerability in the GraphQL saveAsset mutation, which fetches an attacker-supplied URL server-side. The anti-SSRF validation is incomplete: validateIp does not cover CGNAT 100.64.0.0/...