CVE-2026-56022

MEDIUM 5.3

Webmin MFA bypass

CVSS Score

5.3

EPSS Score

0.0%

EPSS Percentile

0th

Webmin accepts basic authentication without session cookies when an attacker provides the 'User-Agent: webmin' header, allowing bypass of additional MFA requirements. Fixed in 2.641.

CWE	CWE-308
Vendor	webmin
Product	webmin
Published	Jun 18, 2026

Stay Ahead of the Next One

Get instant alerts for webmin webmin

Be the first to know when new medium vulnerabilities affecting webmin webmin are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

Low

Availability

None

Affected Versions

Webmin / Webmin

0 < 2.641

References

NVD ↗ CVE.org ↗ EPSS Data ↗

webmin.com: https://webmin.com/security/#webmin-prior-to-2641 github.com: https://github.com/webmin/webmin/releases/tag/2.641 raw.githubusercontent.com: https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json cve.org: https://www.cve.org/CVERecord?id=CVE-2026-56022

Credits

Adem El Adeb, vulone.com/vul1.com