CVE-2026-56022 MEDIUM

CVE-2026-56022: Webmin MFA bypass

Vendor Webmin
Product Webmin
Weakness CWE-308
Published June 18, 2026
Last update August 11, 2026
View on NVD All CVEs

CVSS base score

5.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality None
Integrity Low

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

June 18, 2026 CVE published
August 11, 2026 Record updated