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Vulnerabilities

Vulnerability · CVE-2026-25048

xgrammar is an open-source library for efficient, flexible, and portable structured generation.

Published Mar 5, 2026 · catalog updated Jul 21, 2026 · xgrammar is an open-source

Check if you run it

No confirmed exploitation is on record for CVE-2026-25048. EPSS is 1.17%. Act only if a listed version of xgrammar is an open-source is installed.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (xgrammar is an open-source).
  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
Severity
High8.7
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
1.17%
Remediation
Advisory link
Affected products
cpe mlc-ai/xgrammar

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • cpe mlc-ai/xgrammarversion unspecified

How to fix CVE-2026-25048

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-25048. EPSS is 1.17%. Act only if a listed version of xgrammar is an open-source is installed.

Which versions are affected?

Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

CWE-674. EPSS 1.17%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Mar 5, 2026 · NIST NVD

    Detected

    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.

  2. Jul 21, 2026 · NIST NVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-25048

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-25048

    30-day exploitation probability 1.2%

    first.org
  • NIST NVDVulnerability recordCVE-2026-25048

    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.

    nvd.nist.gov

References

Freshness

Last verified in this catalog Oct 18, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.