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    CVE-2026-27142

    Actions which insert URLs into the content attribute of HTML meta tags are not escaped. This can allow XSS if the meta tag also has an http-equiv attribute with the value "refresh". A new GODEBUG setting has been added, htmlmetacontenturlescape, which can be used to disable escaping URLs in actions in the meta content attribute which follow "url=" by setting htmlmetacontenturlescape=0.

    Published:Mar 6, 2026
    Last Modified:Apr 21, 2026
    EPS:Mar 6, 2026
    EPSS Score:0.00015
    CVSS Score:6.1

    Affected Products

    Vendor
    Go Standard Library
    Product
    Html/template
    Vendor
    Golang
    Product
    Go

    Exploits

    No exploit reference

    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