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    CVE-2026-56020

    The Webmin HTTP server (miniserv.pl) allows unauthenticated attackers to impersonate any user with a configured SSL client certificate by sending a forged HTTP header. A remote attacker can spoof certificate DNs and authenticate as any user. Fixed in 2.202.

    Published:Jun 18, 2026
    Last Modified:Aug 11, 2026
    EPS:Jun 18, 2026
    EPSS Score:0.00495
    CVSS Score:8.1

    Affected Products

    Vendor
    Webmin
    Product
    Webmin

    Exploits

    No exploit reference

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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