{"id":"GHSA-9hcf-v7m4-6m2j","summary":"vLLM allows clients to crash the openai server with invalid regex","details":"### Impact\n\nA denial of service bug caused the vLLM server to crash if an invalid regex was provided while using structured output. This vulnerability is similar to [GHSA-6qc9-v4r8-22xg](https://github.com/vllm-project/vllm/security/advisories/GHSA-6qc9-v4r8-22xg), but for regex instead of a JSON schema.\n\nIssue with more details: https://github.com/vllm-project/vllm/issues/17313\n\n### Patches\n\n* https://github.com/vllm-project/vllm/pull/17623","aliases":["CVE-2025-48943","PYSEC-2025-55"],"modified":"2026-02-04T02:59:05.360205Z","published":"2025-05-28T19:42:12Z","related":["CGA-x7fj-jfmh-mq67"],"database_specific":{"cwe_ids":["CWE-248"],"github_reviewed_at":"2025-05-28T19:42:12Z","github_reviewed":true,"nvd_published_at":"2025-05-30T19:15:30Z","severity":"MODERATE"},"references":[{"type":"WEB","url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-9hcf-v7m4-6m2j"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-48943"},{"type":"WEB","url":"https://github.com/vllm-project/vllm/issues/17313"},{"type":"WEB","url":"https://github.com/vllm-project/vllm/pull/17623"},{"type":"WEB","url":"https://github.com/vllm-project/vllm/commit/08bf7840780980c7568c573c70a6a8db94fd45ff"},{"type":"WEB","url":"https://github.com/pypa/advisory-database/tree/main/vulns/vllm/PYSEC-2025-55.yaml"},{"type":"PACKAGE","url":"https://github.com/vllm-project/vllm"}],"affected":[{"package":{"name":"vllm","ecosystem":"PyPI","purl":"pkg:pypi/vllm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0.8.0"},{"fixed":"0.9.0"}]}],"versions":["0.8.0","0.8.1","0.8.2","0.8.3","0.8.4","0.8.5","0.8.5.post1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/05/GHSA-9hcf-v7m4-6m2j/GHSA-9hcf-v7m4-6m2j.json"}}],"schema_version":"1.7.3","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}