CVE-2026-126781

high

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 un…

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.

CVSS

7.5

7.5 (CVSS v3.1)

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)

Timeline (UTC)

Published: 2026-11-11 19:17

Modified: 2026-11-11 19:17

NVD status: Deferred

Last synced 50 minutes ago

Verified against the source API 2026-11-11 19:42 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

Not reported by the source (unknown — not "none").

Weakness classification (CWE)

CWE-93

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

https://github.com/webmin/webmin/blob/2.670/acl/cert_issue.cgi#L22-L52 disclosure@vulncheck.com
https://github.com/webmin/webmin/commit/0c449e341746d8c445c8c7db223eac1f41755943 disclosure@vulncheck.com
https://github.com/webmin/webmin/commit/8fb194e5fbc30a6664545d48940d03759ace9bf2 disclosure@vulncheck.com
https://www.vulncheck.com/advisories/webmin-through-2.670-users-file-injection-via-acl-cer... disclosure@vulncheck.com

Data sources

NVD CVE API 2.0 — fetched 2026-11-11 19:42 UTC · record ↗

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