xgrammar vulnerabilities and fixes

Recent CVEs affecting xgrammar, with upgrade or downgrade steps. 4 tracked.

xgrammar has 4 tracked vulnerabilities, 0 critical. A fixed release or vendor patch exists for 3. Most recent: 2026-03-05. Highest priority: CVE-2026-25048 (score 53/100).

• CVE-2026-25048 HIGH 7.5 UPGRADE xgrammar is an open-source library for efficient, flexible, and portable structured generation
• CVE-2025-58446 HIGH 7.5 DOWNGRADE xgrammar is an open-source library for efficient, flexible, and portable structured generation
• CVE-2025-57809 HIGH 7.5 UPGRADE XGrammar is an open-source library for efficient, flexible, and portable structured generation
• CVE-2025-32381 MEDIUM 6.5 UPGRADE XGrammar is an open-source library for efficient, flexible, and portable structured generation

FAQ

How do I fix xgrammar vulnerabilities?

Open the CVE for your version, check the affected range, then follow the listed action: upgrade to the fixed release, or downgrade or mitigate if no fix exists yet. Commands for each OS are shown on every CVE page.

Is xgrammar being exploited right now?

None of the tracked xgrammar CVEs are on the CISA Known Exploited Vulnerabilities list at the moment. This is checked every 20 minutes.

Which xgrammar CVE should I patch first?

CVE-2026-25048 currently ranks highest (53/100): xgrammar is an open-source library for efficient, flexible, and portable structured generation.

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