CVE-2026-42210 | Webmin is a web-based system administration tool for Unix-li… | CVSS 5.3 MEDIUM

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.

Metadata

CVE ID: CVE-2026-42210
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-04-25 05:04 UTC
Published: 2026-07-20 17:03 UTC
Last updated: 2026-07-20 17:41 UTC
Primary CWE: CWE-287
CWE-287: Improper Authentication
Vendor / Product: webmin / webmin
Sources: cve.org · NVD

Severity & Metrics

5.3 MEDIUM CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: no
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
webmin	webmin	—	< 2.640

Weakness (CWE)

CWE	Source	Description
CWE-287	cna	CWE-287: Improper Authentication

CVSS scores (1)

Score	Severity	Version	Source	Vector
5.3	MEDIUM	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

References (2)

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