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 2.640.

CVSS v3 5.3 MEDIUM

5.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://github.com/webmin/webmin/releases/tag/2.640	Release Notes
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-169-02.json	VDB Entry
https://webmin.com/security/#webmin-prior-to-2640	Vendor Advisory
https://www.cve.org/CVERecord?id=CVE-2026-56022	VDB Entry

Configurations

Configuration 1 (hide)

cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-06-18 17:16

Updated : 2026-08-11 17:05

NVD link : CVE-2026-56022

Mitre link : CVE-2026-56022

CVE.ORG link : CVE-2026-56022

JSON object : View

Products Affected

webmin

webmin

CWE

CWE-308

Use of Single-factor Authentication

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