Description
Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.640.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Webmin | Webmin | < 2.640 | 2.640 |
Advisories 2
- VA-26-169-02 Webmin multiple vulnerabilities CISA ICS & IT advisories · Aug 11, 2026
- WID-SEC-2026-2014 Webmin: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 18, 2026