CVE-2026-56022CWE-308

CVE-2026-56022

Medium · published June 18, 2026

CVSS v3.1
5.3
EPSS
1%
Percentile
44.2
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.3 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00555 · 44.2th percentile
Weakness
CWE-308 · Use of Single-factor Authentication
Published
2026-06-18T21:16Z
Affected products (1)
ProductVersionsFixed in
webmin/webmin< 2.6402.640
References (4)
https://github.com/webmin/webmin/releases/tag/2.640 · 9119a7d8-5eab-497f-8521-727c672e3725https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json · 9119a7d8-5eab-497f-8521-727c672e3725https://webmin.com/security/#webmin-prior-to-2640 · 9119a7d8-5eab-497f-8521-727c672e3725https://www.cve.org/CVERecord?id=CVE-2026-56022 · 9119a7d8-5eab-497f-8521-727c672e3725
EPSS history
Timeline
  • 18 JUN 16:11Z
    Webmin MFA bypass
    cvelistv5