{"id":"CVE-2026-102577","aliases":["BIT-moodle-2026-102577","EUVD-2026-89716","GHSA-29qm-g73m-2r7h","UBUNTU-CVE-2026-102577"],"status":"published","title":"Moodle: ssrf risk in url downloader via ipv4-mapped ipv6 address bypass","description":"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).","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00246,"percentile":0.16061,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-918"],"published":"2026-09-30T08:35:59Z","modified":"2026-10-28T02:31:04Z","fixes":[{"ecosystem":"Bitnami","package":"moodle","fixed_in":["4.5.13","5.0.9","5.1.6","5.2.2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"moodle","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.5.13"},{"introduced":"5.0.0"},{"fixed":"5.0.9"},{"introduced":"5.1.0"},{"fixed":"5.1.6"},{"introduced":"5.2.0"},{"fixed":"5.2.2"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"moodle","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"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"moodle","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.0.3+dfsg-0ubuntu1","3.0.3+dfsg-0ubuntu1+esm1"]}],"products":[{"vendor":"moodle","product":"moodle"}],"references":[{"url":"http://git.moodle.org/gw?p=moodle.git\u0026a=search\u0026h=HEAD\u0026st=commit\u0026s=MDL-88779","tags":["Patch","fix","web","report"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-102577","tags":["vdb-entry","x_refsource_REDHAT","Third Party Advisory","advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543604","tags":["issue-tracking","x_refsource_REDHAT","Issue Tracking","Third Party Advisory","advisory","report"]},{"url":"https://moodle.org/mod/forum/discuss.php?d=482495","tags":["Vendor Advisory","advisory","web","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102577","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-29qm-g73m-2r7h"},{"url":"https://git.moodle.org","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/102xxx/CVE-2026-102577.json","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-102577","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-102577","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-102577","title":"Moodle: ssrf risk in url downloader via ipv4-mapped ipv6 address bypass","description":"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).","status":"published","published":"2026-09-30T08:35:59.663Z","modified":"2026-09-30T14:37:24.853Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T13:38:54.394896Z"}],"euvd":[{"id":"EUVD-2026-89716","description":"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).","status":"published","published":"2026-09-30T08:35:59Z","modified":"2026-09-30T14:37:24Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T17:27:49.499669Z"}],"ghsa":[{"id":"GHSA-29qm-g73m-2r7h","title":"A flaw was found in Moodle. Incorrect handling of IPv4-mapped IPv6 addresses within the URL...","description":"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).","status":"published","published":"2026-09-30T09:31:11Z","modified":"2026-09-30T09:31:12Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:12:35.884172Z"}],"nvd":[{"id":"CVE-2026-102577","description":"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).","status":"published","published":"2026-09-30T09:17:14.66Z","modified":"2026-10-01T14:14:18.313Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T14:12:52.759595Z"}],"osv":[{"id":"CVE-2026-102577","title":"Moodle: ssrf risk in url downloader via ipv4-mapped ipv6 address bypass","description":"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).","status":"published","published":"2026-09-30T08:35:59.663Z","modified":"2026-10-28T02:31:04.610874897Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"cwes":["CWE-918"],"updated_at":"2026-11-02T15:44:53.83521Z"},{"id":"UBUNTU-CVE-2026-102577","description":"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).","status":"published","published":"2026-09-30T09:17:00Z","modified":"2026-10-01T00:21:06.434999212Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T16:55:58.519486Z"},{"id":"BIT-moodle-2026-102577","title":"Moodle: ssrf risk in url downloader via ipv4-mapped ipv6 address bypass","description":"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).","status":"published","published":"2026-10-05T11:55:20.779Z","modified":"2026-10-05T14:30:07.640583045Z","updated_at":"2026-11-02T15:28:33.469426Z"}]}}