xgrammar: Multi-layer nesting causes DoS
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.7%
exploitation probability
0.7%top 48% of all CVEs
observed exploitation
nono source reports it
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.
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
Affected products
mlc-ai · xgrammarReferences
https://access.redhat.com/errata/RHSA-2026:24977https://access.redhat.com/errata/RHSA-2026:42644https://access.redhat.com/errata/RHSA-2026:5809https://access.redhat.com/errata/RHSA-2026:6761https://access.redhat.com/errata/RHSA-2026:6762https://access.redhat.com/security/cve/CVE-2026-25048https://bugzilla.redhat.com/show_bug.cgi?id=2444840https://github.com/mlc-ai/xgrammar/releases/tag/v0.1.32https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-7rgv-gqhr-fxg3https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25048.json