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CVE-2025-58446

25
FAUCET Score

CVE-2025-58446 describes a Denial-of-Service (DoS) vulnerability in the xgrammar library, specifically affecting versions prior to 0.1.24. The flaw lies in a grammar optimizer that processes large grammars inefficiently, allowing an attacker to consume excessive resources and disrupt model providers. With a CVSS score of 7.5 (HIGH), this vulnerability is easily exploitable over the network with low attack complexity, potentially leading to a complete loss of availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
0.1.23CPE matchmatch criteria
cpe:2.3:a:mlc-ai:xgrammar:0.1.23:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

6.9MEDIUM

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
NONE
VS Integrity
NONE
VS Availability
LOW
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.50%
Probability of exploitation in next 30 days
EPSS Percentile
39.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0050 is in the 18th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
pippatch availablevia ghsa
Product: xgrammarFixed in: 0.1.24

Vendor Advisories (2)

redhatCVE-2025-58446Moderate

xgrammar: xgrammar vulnerable to denial of service by huge enum grammar

Sep 6, 2025
pipGHSA-9q5r-wfvf-rr7fmedium

xgrammar vulnerable to denial of service by huge enum grammar

Sep 5, 2025

References

github.com / mlc-ai/xgrammar/commit/ced69c3ad2f8f61b516cc278a342e7c644383e27
Patch
github.com / mlc-ai/xgrammar/security/advisories/GHSA-9q5r-wfvf-rr7f
ExploitVendor Advisory