CVE-2025-57809
XGrammar affected by Denial of Service by infinite recursion grammars
HIGH
7.5
CVSS Score
Published: August 25, 2025 at 09:22 PM UTC
Updated: June 17, 2026 at 09:43 AM UTC
1 product affected across 1 vendorXgrammar
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Severity
HIGH7.5
Exploit prediction
EPSS 0.5%
SSVC
No known exploit
Description
XGrammar is an open-source library for efficient, flexible, and portable structured generation. Prior to version 0.1.21, XGrammar has an infinite recursion issue in the grammar. This issue has been resolved in version 0.1.21.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
References (3)
x_refsource_MISCPatch
Source: [email protected]
https://github.com/mlc-ai/xgrammar/commit/b943feacb5a1caf4d39de8ec3bf7c7ce066dcee5x_refsource_MISCExploitIssue Tracking
Source: [email protected]
https://github.com/mlc-ai/xgrammar/issues/250x_refsource_CONFIRMVendor Advisory
Source: [email protected]
https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-5cmr-4px5-23pcSSVC — Action Prioritization
SSVCNo known exploitNot automatablePartial impact
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- NETWORK
- Complexity
- LOW
- Privileges
- NONE
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
Vector?
Quick Info
StatusANALYZED
CWE
CWE-674
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