CVE-2026-126781

Webmin through 2.670 Users File Injection via acl/cert_issue.cgi

Published Nov 11, 2026 CVSS 4.0 · 7.7 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
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.
Title Webmin through 2.670 Users File Injection via acl/cert_issue.cgi
First Time appeared Webmin
Webmin webmin
Weaknesses CWE-93
CPEs cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:*
Vendors & Products Webmin
Webmin webmin
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 7.7, '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Nov 13, 2026, 12:03 AM
Reserved
Nov 11, 2026, 6:27 PM
Status
Deferred
Published
Nov 11, 2026, 7:17 PM
Modified
Nov 13, 2026, 2:18 AM