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    CVE-2024-10549

    A vulnerability in the `/3/Parse` endpoint of h2oai/h2o-3 version 3.46.0.1 allows for a denial of service (DoS) attack. The endpoint uses a user-specified string to construct a regular expression, which is then applied to another user-specified string. By sending multiple simultaneous requests, an attacker can exhaust all available threads, leading to a complete denial of service.

    Published:Mar 20, 2025
    Last Modified:Oct 15, 2025
    EPS:Mar 20, 2025
    EPSS Score:0.00134
    CVSS Score:7.5

    Affected Products

    Vendor
    H2o
    Product
    H2o

    Exploits

    https://huntr.com/bounties/ce7bd2d6-fd38-440d-a91a-dd8f3fc06bc2

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-492 Regular Expression Exponential Blowup

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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