{"affected":[{"defaultStatus":"unaffected","ecosystem":"github","packageName":"webmin/webmin","product":"webmin","source":"CNA: VulnCheck","vendor":"webmin","versions":[{"lessThanOrEqual":"2.670","status":"affected","version":"0","versionType":"custom"}]}],"cveId":"CVE-2026-126781","cwes":["CWE-93"],"description":"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":7.7,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":7.5,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}],"modifiedAt":1794422471509,"publishedAt":1794422471509,"references":[{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/webmin/webmin/commit/0c449e341746d8c445c8c7db223eac1f41755943"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/webmin/webmin/commit/8fb194e5fbc30a6664545d48940d03759ace9bf2"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/webmin/webmin/blob/2.670/acl/cert_issue.cgi#L22-L52"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/webmin-through-2.670-users-file-injection-via-acl-cert-issue-cgi"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/webmin/webmin/commit/0c449e341746d8c445c8c7db223eac1f41755943"},{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/webmin/webmin/commit/8fb194e5fbc30a6664545d48940d03759ace9bf2"}],"revision":"5ed486b2741c3f4d632dc663d30ed779bde0c72d74eae190d06ea80a5bb655b6","sources":[{"modifiedAt":1794422471509,"name":"CNA: VulnCheck","retrievedAt":1794424141005,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126781"}],"ssvc":null,"status":"published","title":"Webmin through 2.670 Users File Injection via acl/cert_issue.cgi","updatedAt":1794424141005}