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CWE

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CVE-2025-58446

Published: Sep 6, 2025

Modified: Sep 8, 2025

PUBLISHED

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.

Vendor	Product	Versions
mlc-ai	xgrammar	affected `= 0.1.23, < 0.1.24`

Weaknesses (CWE)

References

https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-9q5r-wfvf-rr7f

x_refsource_CONFIRM

https://github.com/mlc-ai/xgrammar/commit/ced69c3ad2f8f61b516cc278a342e7c644383e27

x_refsource_MISC

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