{"id":"CVE-2026-102577","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102577","generatedAt":"2026-10-28T10:48:19.962Z","title":"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.","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).","published":"2026-09-30T09:17:15.000Z","lastModified":"2026-10-01T14:14:18.000Z","status":"Analyzed","sourceIdentifier":"patrick@puiterwijk.org","cvss":{"version":"3.1","score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"cwe":["CWE-918"],"affected":["moodle/moodle"],"epss":{"score":0.00246,"percentile":0.15836,"date":"2026-10-27","history":[{"date":"2026-09-30","score":0.00263,"percentile":0.16433}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-30T09:17:15.000Z","detail":{"score":"4.3","severity":"MEDIUM","publishedAt":"2026-09-30T09:17:14.660Z"},"summary":"New CVE, medium severity (CVSS 4.3)."}],"references":[{"url":"http://git.moodle.org/gw?p=moodle.git&a=search&h=HEAD&st=commit&s=MDL-88779","tags":["Patch"],"source":"patrick@puiterwijk.org"},{"url":"https://access.redhat.com/security/cve/CVE-2026-102577","tags":["Third Party Advisory"],"source":"patrick@puiterwijk.org"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2543604","tags":["Issue Tracking","Third Party Advisory"],"source":"patrick@puiterwijk.org"},{"url":"https://moodle.org/mod/forum/discuss.php?d=482495","tags":["Vendor Advisory"],"source":"patrick@puiterwijk.org"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102577","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}