CVE-2025-32381
CVE-2025-32381 · Denial of Service by abusing xgrammar unbounded cache in memory
This page contains facts from public vulnerability sources. Check the original advisory before updating.
XGrammar is an open-source library for efficient, flexible, and portable structured generation. Prior to 0.1.18, Xgrammar includes a cache for compiled grammars to increase performance with repeated use of the same grammar. This cache is held in memory. Since the cache is unbounded, a system making use of xgrammar can be abused to fill up a host's memory and case a denial of service. For example, sending many small requests to an LLM inference server with unique JSON schemas would eventually cause this denial of service to occur. This vulnerability is fixed in 0.1.18.
CVSS 6.5 · Medium · EPSS 0.5% · Fix available
- Published
- Updated
Stack: python
Affected products and versions
xgrammar
- Versions
- < 0.1.18: Affected
No fix published
xgrammar PyPI
- Versions
- 0.1.0
- 0.1.1
- 0.1.10
- 0.1.11
- 0.1.12
- 0.1.13
- 0.1.17
- 0.1.6
- 0.1.7
- 0.1.8
- 0.1.9
- Affected ranges
- ECOSYSTEM: < 0.1.18
Update to 0.1.18
xgrammar PyPI
- Versions
- 0.1.0
- 0.1.1
- 0.1.10
- 0.1.11
- 0.1.12
- 0.1.13
- 0.1.14
- 0.1.15
- 0.1.16
- 0.1.17
- 0.1.2
- 0.1.3
- 0.1.4
- 0.1.4rc2
- 0.1.5
- 0.1.5rc1
- 0.1.6
- 0.1.7
- 0.1.8
- 0.1.9
- Affected ranges
- ECOSYSTEM: < 0.1.18
Update to 0.1.18