{"id":"CVE-2025-48943","summary":"vLLM allows clients to crash the openai server with invalid regex","details":"vLLM is an inference and serving engine for large language models (LLMs). Version 0.8.0 up to but excluding 0.9.0 have a Denial of Service (ReDoS) that causes the vLLM server to crash if an invalid regex was provided while using structured output. This vulnerability is similar to GHSA-6qc9-v4r8-22xg/CVE-2025-48942, but for regex instead of a JSON schema. Version 0.9.0 fixes the issue.","aliases":["GHSA-9hcf-v7m4-6m2j","PYSEC-2025-55"],"modified":"2026-08-12T03:51:34.892281451Z","published":"2025-05-30T18:36:01.519Z","database_specific":{"cwe_ids":["CWE-248"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48943.json","cna_assigner":"GitHub_M"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/48xxx/CVE-2025-48943.json"},{"type":"ADVISORY","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":"REPORT","url":"https://github.com/vllm-project/vllm/issues/17313"},{"type":"FIX","url":"https://github.com/vllm-project/vllm/commit/08bf7840780980c7568c573c70a6a8db94fd45ff"},{"type":"FIX","url":"https://github.com/vllm-project/vllm/pull/17623"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/vllm-project/vllm","events":[{"introduced":"966f933ee1cd7c9a41db60de5c7ff98657005251"},{"fixed":"58738772410c5e0d60b61db39538a9b313d2d7ad"},{"fixed":"08bf7840780980c7568c573c70a6a8db94fd45ff"}],"database_specific":{"cpe":"cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:*","extracted_events":[{"introduced":"0.8.0"},{"fixed":"0.9.0"}],"source":["CPE_RANGE","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2025-48943.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}