Bug 2444840 (CVE-2026-25048)

Summary: CVE-2026-25048 xgrammar: xgrammar: Denial of Service via multi-level nested syntax
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: alinfoot, bbrownin, dtrifiro, jkoehler, lphiri, rbryant, weaton
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in xgrammar, an open-source library for structured generation. This vulnerability allows an attacker to trigger a segmentation fault, causing the program to crash and resulting in a Denial of Service (DoS). The issue occurs due to improper handling of multi-level nested syntax.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-03-05 16:01:37 UTC
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.