CVE-2025-58446
CVSS v3
7.5
HIGH
EPSS Score
0.6 %
exploit probability, as of 2026-10-12
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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Affected and fixed versions
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Packages
- xgrammarPyPIfrom 0.1.23 · fixed in 0.1.24
Vendor advisories
- CVE-2025-58446 Red Hat Product Security
xgrammar: xgrammar vulnerable to denial of service by huge enum grammar
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.
Technical details
- Published
- 2025-09-06
Frequently asked questions
What is 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.
Is CVE-2025-58446 actively exploited?
Active exploitation of CVE-2025-58446 has not been confirmed. Its EPSS score was 0.6% on 2026-10-12, the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2025-58446?
CVE-2025-58446 has a CVSS v3 base score of 7.5 (HIGH severity).
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