Vulnerability 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.
CVSS Score
5.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Webmin | Webmin | < 2.640 |
Related Weaknesses (CWE)
References
- https://github.com/webmin/webmin/releases/tag/2.640Release Notes
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/VDB Entry
- https://webmin.com/security/#webmin-prior-to-2640Vendor Advisory
- https://www.cve.org/CVERecord?id=CVE-2026-56022VDB Entry
FAQ
What is CVE-2026-56022?
CVE-2026-56022 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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.
How severe is CVE-2026-56022?
CVE-2026-56022 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-56022?
Check the references section above for vendor advisories and patch information. Affected products include: Webmin Webmin.