CVE-2025-58446

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/mlc-ai/xgrammar/commit/ced69c3ad2f8f61b516cc278a342e7c644383e27	Patch
https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-9q5r-wfvf-rr7f	Exploit Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:mlc-ai:xgrammar:0.1.23:*:*:*:*:*:*:*

History

18 Sep 2025, 15:57

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 7.5
References	~~() https://github.com/mlc-ai/xgrammar/commit/ced69c3ad2f8f61b516cc278a342e7c644383e27 -~~	() https://github.com/mlc-ai/xgrammar/commit/ced69c3ad2f8f61b516cc278a342e7c644383e27 - Patch
References	~~() https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-9q5r-wfvf-rr7f -~~	() https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-9q5r-wfvf-rr7f - Exploit, Vendor Advisory
First Time		Mlc-ai xgrammar Mlc-ai
CPE		cpe:2.3:a:mlc-ai:xgrammar:0.1.23:::::::*

06 Sep 2025, 19:15

Type	Values Removed	Values Added
New CVE

Information

Published : 2025-09-06 19:15

Updated : 2025-09-18 15:57

NVD link : CVE-2025-58446

Mitre link : CVE-2025-58446

CVE.ORG link : CVE-2025-58446

JSON object : View

Products Affected

mlc-ai

xgrammar

CWE

CWE-770

Allocation of Resources Without Limits or Throttling

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