CVE-2025-58446CWE-770

xgrammar vulnerable to denial of service by huge enum grammar

Medium · published September 6, 2025

CVSS v4.0
6.9
EPSS
1%
Percentile
49.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00619 · 49.0th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2025-09-06T19:06Z
EPSS history
Timeline
  • 06 SEP 19:06Z
    xgrammar vulnerable to denial of service by huge enum grammar
    cvelistv5