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Status published
Medium
CVE-2025-58446
xgrammar vulnerable to denial of service by huge enum grammar
Vulnerability Description
xgrammar is an open-source library for efficient, flexible, and portable structured generation. A grammar optimizer introduced in 0.1.23 processes large grammars (>100k characters) at very low rates, and can be used for DOS of model providers. This issue is fixed in version 0.1.24.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
Affected Vendor
mlc-ai
View all reports →Affected Software
xgrammar
Vulnerable Versions:
= 0.1.23, < 0.1.24
Timeline
Official Publish:
September 6th, 2025
Last Modified:
September 8th, 2025
Added to House:
July 22nd, 2026