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    CVE-2024-5550

    In h2oai/h2o-3 version 3.40.0.4, an exposure of sensitive information vulnerability exists due to an arbitrary system path lookup feature. This vulnerability allows any remote user to view full paths in the entire file system where h2o-3 is hosted. Specifically, the issue resides in the Typeahead API call, which when requested with a typeahead lookup of '/', exposes the root filesystem including directories such as /home, /usr, /bin, among others. This vulnerability could allow attackers to explore the entire filesystem, and when combined with a Local File Inclusion (LFI) vulnerability, could make exploitation of the server trivial.

    Published:Jun 6, 2024
    Last Modified:Oct 15, 2025
    EPS:Jun 6, 2024
    EPSS Score:0.0111
    CVSS Score:5.3

    Affected Products

    Vendor
    H2o
    Product
    H2o

    Exploits

    https://huntr.com/bounties/e76372c2-39be-4984-a7c8-7048a75a25dchttps://huntr.com/bounties/e76372c2-39be-4984-a7c8-7048a75a25dc

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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