What is CVE-2026-56022?

CVE-2026-56022 is a medium-severity vulnerability in Webmin, classified under Use of Single-factor Authentication. CVSS score: 5.3/10. Published 2026-06-18.

How severe is CVE-2026-56022?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Vulnerability in Webmin

CVE-2026-56022

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.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N.

Affected products

Webmin — versions 0, 2.641

Weakness classification (CWE)

CWE-308 — Use of Single-factor Authentication

References

9119a7d8-5eab-497f-8521-727c672e3725 (release-notes)
9119a7d8-5eab-497f-8521-727c672e3725 (release-notes)
9119a7d8-5eab-497f-8521-727c672e3725
9119a7d8-5eab-497f-8521-727c672e3725 (vdb-entry)

Frequently asked questions

What is CVE-2026-56022?: CVE-2026-56022 is a medium-severity vulnerability in Webmin, classified under Use of Single-factor Authentication. CVSS score: 5.3/10. Published 2026-06-18.
How severe is CVE-2026-56022?: Medium severity. CVSS v3 base score is 5.3 out of 10.