{"id":"CVE-2026-102577","title":"A flaw was found in Moodle","summary":"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…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","cwe":["CWE-918"],"product":"moodle","affected":["moodle >= 5.2.0 < 5.2.2","moodle >= 5.1.0 < 5.1.6","moodle >= 5.0.0 < 5.0.9","moodle < 4.5.13"],"published":"2026-09-30","updated":"2026-09-30","sourceUpdated":"2026-09-30T09:17:14.660","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102577","references":[{"url":"http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88779","label":"patrick@puiterwijk.org"},{"url":"https://access.redhat.com/security/cve/CVE-2026-102577","label":"patrick@puiterwijk.org"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543604","label":"patrick@puiterwijk.org"},{"url":"https://moodle.org/mod/forum/discuss.php?d=482495","label":"patrick@puiterwijk.org"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-30T09:00:29.910Z","slug":"CVE-2026-102577","body":"## Overview\n\nA 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).\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}