xgrammar is an open-source library for efficient, flexible, and portable structured generation. Prior to version 0.1.32, the multi-level nested syntax caused a segmentation fault (core dumped). This issue has been patched in version 0.1.32.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact None

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00052.

Exploitation none

Automatable yes

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
mlc-ai xgrammar affected
Version Status Constraints
< 0.1.32 affected
—

Configuration 1 [-]

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

No data.

Vendor Product Confidence Versions
Mlc-ai Xgrammar 100%
Version Status Scheme Platform
[0,0.1.32)
 affected semver —

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Subscriptions

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-7rgv-gqhr-fxg3 xgrammar vulnerable to DoS via multi-layer nesting
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/mlc-ai/xgrammar/releases/tag/v0.1.32 cve-icon cve-icon cve-icon
https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-7rgv-gqhr-fxg3 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-25048 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-25048 cve-icon
History

Fri, 13 Mar 2026 18:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:mlc-ai:xgrammar:*:*:*:*:*:*:*:*

Fri, 06 Mar 2026 15:30:00 +0000

Type Values Removed Values Added
First Time appeared Mlc-ai
Mlc-ai xgrammar
Vendors & Products Mlc-ai
Mlc-ai xgrammar

Fri, 06 Mar 2026 00:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}

threat_severity

Important

Thu, 05 Mar 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 05 Mar 2026 16:00:00 +0000

Type Values Removed Values Added
Description xgrammar is an open-source library for efficient, flexible, and portable structured generation. Prior to version 0.1.32, the multi-level nested syntax caused a segmentation fault (core dumped). This issue has been patched in version 0.1.32.
Title xgrammar: Multi-layer nesting causes DoS
Weaknesses CWE-674
References
Metrics cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N'}
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-05T16:33:36.678Z

Reserved: 2026-01-28T14:50:47.886Z

Link: CVE-2026-25048

cve-icon Vulnrichment

Updated: 2026-03-05T16:33:33.059Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-05T16:16:15.853

Modified: 2026-03-13T18:09:38.707

Link: CVE-2026-25048

cve-icon Redhat

Severity : Important

Publid Date: 2026-03-05T15:34:42Z

Links: CVE-2026-25048 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-03-06T15:01:47Z

Weaknesses