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    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.

    Published:Jun 18, 2026
    Last Modified:Aug 11, 2026
    EPS:Jun 18, 2026
    EPSS Score:0.00525
    CVSS Score:5.3

    Affected Products

    Vendor
    Webmin
    Product
    Webmin

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-56021 (CVSS 6.9) — Webmin allows unauthenticated attackers to read the contents of any file ending in .conf within module directo…
    CVE-2026-49103 (CVSS 9.4) — Webmin before 2.640 does not safely construct a filename for saving of an attachment within the mailboxes comp…
    CVE-2026-49102 (CVSS 6.1) — Webmin before 2.640 allows mailboxes/detach.cgi XSS via an SVG document attachment that is viewed in the mailb…
    CVE-2026-22678 (CVSS 5.1) — Webmin before 2.641 contains a stored cross-site scripting vulnerability in the email template description fie…
    CVE-2025-67738 (CVSS 8.5) — squid/cachemgr.cgi in Webmin before 2.600 does not properly quote arguments. This is relevant if Webmin's Squi…
    CVE-2025-61541 (CVSS 7.1) — Webmin 2.510 is vulnerable to a Host Header Injection in the password reset functionality (forgot_send.cgi). T…
    CVE-2024-12828 (CVSS 8.8) — Webmin CGI Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers t…
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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High