What’s Vulnerable › Vulnerabilities

CVE-2026-42210: Webmin 2FA requirement bypass

• Severity: medium (CVSS 5.3 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-20 · updated 2026-07-23
• Weakness: CWE-287

Description

Webmin is a web-based system administration tool for Unix-like servers. Prior to version 2.640, for Webmin accounts that require a second authentication factor (typically TOTP), an attacker with knowledge of the username and password can bypass the 2FA requirement by using Basic authentication. Webmin is a web-based system administration tool for Unix-like servers. As a workaround, apply the patch from commit da18a16c84ae5c0b78cad79609cb0efb174000ec manually.

Affected products

• Webmin: before 2.640

References

• https://github.com/webmin/webmin/commit/da18a16c84ae5c0b78cad79609cb0efb174000ec
• https://github.com/webmin/webmin/security/advisories/GHSA-qpww-fff2-6fgv

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