CVE-2026-102577 [MEDIUM] – A flaw was found in Moodle. Incorrect handling of IPv4-mapped IPv6 addresses within the UR

A flaw was found in Moodle. Incorrect handling of IPv4-mapped IPv6 addresses within the URL downloader’s host-blocking logic allows an authenticated remote user to bypass blocked-host restrictions. By supplying a crafted URL, an attacker can induce the server to make requests to restricted destinations, leading to Server-Side Request Forgery (SSRF).