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{"bugzilla": {"description": "xgrammar: xgrammar Vulnerable to Denial of Service (DoS) by abusing unbounded cache in memory", "id": "2358639", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2358639"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-770", "details": ["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.", "A flaw was found in Xgrammar. This vulnerability allows a denial of service (DoS) via unbounded memory usage when handling a large number of unique grammar inputs from untrusted sources."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2025-32381", "package_state": [{"cpe": "cpe:/a:redhat:enterprise_linux_ai:1", "fix_state": "Fix deferred", "package_name": "rhelai1/ui-rhel9", "product_name": "Red Hat Enterprise Linux AI (RHEL AI)"}], "public_date": "2025-04-09T13:08:59Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2025-32381\nhttps://nvd.nist.gov/vuln/detail/CVE-2025-32381\nhttps://github.com/mlc-ai/xgrammar\nhttps://github.com/mlc-ai/xgrammar/pull/243\nhttps://github.com/mlc-ai/xgrammar/security/advisories/GHSA-389x-67px-mjg3"], "threat_severity": "Moderate"}