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    CVE-2025-57809

    XGrammar is an open-source library for efficient, flexible, and portable structured generation. Prior to version 0.1.21, XGrammar has an infinite recursion issue in the grammar. This issue has been resolved in version 0.1.21.

    Published:Aug 25, 2025
    Last Modified:Sep 9, 2025
    EPS:Aug 25, 2025
    EPSS Score:0.00046
    CVSS Score:7.5

    Affected Products

    Vendor
    Mlc-ai
    Product
    Xgrammar

    Exploits

    https://github.com/mlc-ai/xgrammar/issues/250

    Common Weakness Enumeration

    CWE-674 Uncontrolled Recursion

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-230 Serialized Data with Nested Payloads
    CAPEC-231 Oversized Serialized Data Payloads

    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