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CVE-2025-57809

Good to know:

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Date: August 25, 2025

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.

Severity Score

Related Resources (6)

https://github.com/mlc-ai/xgrammar
https://github.com/mlc-ai/xgrammar/issues/250
https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-5cmr-4px5-23pc
https://github.com/mlc-ai/xgrammar/commit/b943feacb5a1caf4d39de8ec3bf7c7ce066dcee5
https://nvd.nist.gov/vuln/detail/CVE-2025-57809
https://www.mend.io/vulnerability-database/CVE-2025-57809

Severity Score

Weakness Type (CWE)

Uncontrolled Recursion

CWE-674

Top Fix

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Upgrade Version

Upgrade to version xgrammar - 0.1.21;https://github.com/mlc-ai/xgrammar.git - v0.1.21

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

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