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    CVE-2026-52842

    Lightpanda is a headless browser designed for AI and automation. Prior to 0.3.1, Lightpanda searched for @ across the entire URL string instead of only the authority component when computing a page origin, so a URL such as `http://attacker.com/@victim.com/` was fetched from attacker.com but treated as `http://victim.com`, allowing a complete Same-Origin Policy bypass. This issue is fixed in version 0.3.1.

    Published:Jul 15, 2026
    Last Modified:Jul 23, 2026
    EPS:Jul 15, 2026
    EPSS Score:0.00161
    CVSS Score:9.3

    Affected Products

    Vendor
    Lightpanda-io
    Product
    Browser

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-346 Origin Validation Error

    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