{"id":"CVE-2026-126781","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-126781","summary":"Webmin through 2.670 contains a users file injection vulnerability in acl/cert_issue.cgi that allows authenticated Webmin users to inject lines by supplying unvalidated certificate…","details":"Webmin through 2.670 contains a users file injection vulnerability in acl/cert_issue.cgi that allows authenticated Webmin users to inject lines by supplying unvalidated certificate DN fields containing newlines. Attackers can end a DN field with a backslash and newline to add a second root entry with a known password hash, gaining Webmin root access after miniserv restarts.","published":"2026-11-11T18:41:11.509Z","modified":"2026-11-11T18:41:11.509Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":{"url":"https://github.com/webmin/webmin/commit/0c449e341746d8c445c8c7db223eac1f41755943","label":"webmin/webmin@0c449e3"},"references":[{"type":"FIX","url":"https://github.com/webmin/webmin/commit/0c449e341746d8c445c8c7db223eac1f41755943"},{"type":"FIX","url":"https://github.com/webmin/webmin/commit/8fb194e5fbc30a6664545d48940d03759ace9bf2"},{"type":"WEB","url":"https://github.com/webmin/webmin/blob/2.670/acl/cert_issue.cgi#L22-L52"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/webmin-through-2.670-users-file-injection-via-acl-cert-issue-cgi"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-11-11T18:41:11.509Z"}}