PYSEC-2026-2054
See a problem?- Import Source
- https://github.com/pypa/advisory-database/blob/main/vulns/xgrammar/PYSEC-2026-2054.yaml
- JSON Data
- https://api.osv.dev/v1/vulns/PYSEC-2026-2054
- Aliases
- Published
- 2026-07-07T16:03:01.881040Z
- Modified
- 2026-07-07T17:48:17.630220471Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- 7.7 (High) CVSS_V4 - 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/E:P CVSS Calculator
- Summary
- XGrammar affected by Denial of Service by infinite recursion grammars
- Details
-
Summary
This issue: http://github.com/mlc-ai/xgrammar/issues/250 should have it's own security advisory. Since several tools accept and pass user supplied grammars to xgrammar, and it is so easy to trigger it seems like a High.
- References
-
- https://github.com/mlc-ai/xgrammar/security/advisories/GHSA-5cmr-4px5-23pc
- https://nvd.nist.gov/vuln/detail/CVE-2025-57809
- https://github.com/mlc-ai/xgrammar/issues/250
- https://github.com/mlc-ai/xgrammar/commit/b943feacb5a1caf4d39de8ec3bf7c7ce066dcee5
- https://github.com/mlc-ai/xgrammar
- https://pypi.org/project/xgrammar
- https://github.com/advisories/GHSA-5cmr-4px5-23pc
Affected packages
PyPI / xgrammar
Package
- Name
- xgrammar
- View open source insights on deps.dev
- Purl
- pkg:pypi/xgrammar
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced0Unknown introduced version / All previous versions are affectedFixed0.1.21