{"id":"UBUNTU-CVE-2026-102577","details":"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).","modified":"2026-10-01T00:26:11.825557641Z","published":"2026-09-30T09:17:00Z","upstream":["CVE-2026-102577"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2026-102577"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2026-102577"},{"type":"REPORT","url":"http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88779"},{"type":"REPORT","url":"https://access.redhat.com/security/cve/CVE-2026-102577"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543604"},{"type":"REPORT","url":"https://moodle.org/mod/forum/discuss.php?d=482495"}],"affected":[{"package":{"name":"moodle","ecosystem":"Ubuntu:Pro:16.04:LTS","purl":"pkg:deb/ubuntu/moodle?arch=source&distro=esm-apps-legacy%2Fxenial"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["2.7.9+dfsg-1","2.7.10+dfsg-1","2.7.11+dfsg-1","2.7.11+dfsg-2","2.7.12+dfsg-1","3.0.3+dfsg-0ubuntu1","3.0.3+dfsg-0ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_version":"3.0.3+dfsg-0ubuntu1+esm1","binary_name":"moodle"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102577.json"}},{"package":{"name":"moodle","ecosystem":"Ubuntu:Pro:18.04:LTS","purl":"pkg:deb/ubuntu/moodle?arch=source&distro=esm-apps%2Fbionic"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.3+dfsg-0ubuntu1","3.0.3+dfsg-0ubuntu1+esm1"],"ecosystem_specific":{"binaries":[{"binary_name":"moodle","binary_version":"3.0.3+dfsg-0ubuntu1+esm1"}]},"database_specific":{"source":"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-102577.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},{"type":"Ubuntu","score":"medium"}]}