CVE-2026-25048

HIGHNVD 7.57.5
EchelonGraph scoreLOW confidence

This high-severity CVE scores 7.5 under NVD CVSS v3. EPSS exploit-prediction score not yet available (the EPSS model rescores nightly; freshly-published CVEs typically appear within 48 hours). GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

A fix is available — apply 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 v3
7.5
EG Score
7.5(low)
EPSS
48.2%
KEV
Not listed

Published

March 5, 2026

Last Modified

June 30, 2026

Advisory Details (9)

Auto-updated Jul 1, 2026
🔬 Proof of concept available. Patch available. Sources: github_release, github, redhat.
redhat Patch Available
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25048.json
redhat

2444840 – (CVE-2026-25048) CVE-2026-25048 xgrammar: xgrammar: Denial of Service via multi-level nested syntax

https://bugzilla.redhat.com/show_bug.cgi?id=2444840
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-25048
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:6762
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:6761
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:5809
redhat Patch Available
https://access.redhat.com/errata/RHSA-2026:24977
github Patch Available🟡 PoC Available

Multi-layer nesting causes DoS · Advisory · mlc-ai/xgrammar · GitHub

https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-7rgv-gqhr-fxg3
github_release Patch Available

v0.1.32

Patch available: mlc-ai/xgrammar v0.1.32

https://github.com/mlc-ai/xgrammar/releases/tag/v0.1.32

Vendor Advisories for CVE-2026-25048(4)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(4)

Vendor / EcosystemFixed in / PatchReleasedSource
redhatrhoai/odh-vllm-gaudi-rhel9:17800690692026-06-10redhat
redhatrhaiis/model-opt-cuda-rhel9:17745473842026-04-07redhat
redhatrhaiis/vllm-rocm-rhel9:17752525982026-04-07redhat
redhatrhaiis/vllm-cuda-rhel9:17743511442026-03-25redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
xgrammar0.1.0 ... 0.1.9 (34 versions)0.1.32—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 11× in last 7d / 14× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-06 16:27 UTCEPSS rescore
  2. 2026-07-06 16:27 UTCEPSS rescore
  3. 2026-07-06 02:23 UTCEPSS rescore
  4. 2026-07-06 02:23 UTCEPSS rescore
  5. 2026-07-05 02:30 UTCEPSS rescore
  6. 2026-07-04 06:31 UTCEPSS rescore
  7. 2026-07-04 06:31 UTCEPSS rescore
  8. 2026-07-01 15:06 UTCEPSS rescore
  9. 2026-07-01 15:06 UTCEPSS rescore
  10. 2026-06-30 23:22 UTCEPSS rescore
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 04:34 UTCEG score recompute
  13. 2026-06-30 04:34 UTCVendor advisory
  14. 2026-06-30 04:31 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-25048?
CVE-2026-25048 is a high vulnerability published on March 5, 2026. 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.
When was CVE-2026-25048 disclosed?
CVE-2026-25048 was first published in the National Vulnerability Database on March 5, 2026, with the most recent update on June 30, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-25048 actively exploited?
CVE-2026-25048 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 48.2% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-25048?
CVE-2026-25048 has a CVSS v3 base score of 7.5 (NVD). The EG score is currently aggregating — additional source signals are being incorporated as they become available..
How do I remediate CVE-2026-25048?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-25048, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-25048

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