{"cve":"CVE-2025-48943","nvd":{"published":"2025-05-30T19:15:30.280","modified":"2026-06-17T09:30:31.600","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":6.5},"cwes":["CWE-248"],"references":["https://github.com/vllm-project/vllm/commit/08bf7840780980c7568c573c70a6a8db94fd45ff","https://github.com/vllm-project/vllm/issues/17313","https://github.com/vllm-project/vllm/pull/17623","https://github.com/vllm-project/vllm/security/advisories/GHSA-9hcf-v7m4-6m2j"],"products":["vllm:vllm"],"source":"nvd","synced_at":"2026-10-19T22:02:23.998251710+00:00"},"epss":{"cve":"CVE-2025-48943","score":0.00508,"percentile":0.43394,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-9hcf-v7m4-6m2j","url":"https://osv.dev/vulnerability/GHSA-9hcf-v7m4-6m2j","summary":"vLLM allows clients to crash the openai server with invalid regex","modified":"2026-08-07T08:12:07.476205432Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":[">=0.8.0 <0.9.0"],"fixed":["0.9.0"]}]},{"id":"PYSEC-2025-55","url":"https://osv.dev/vulnerability/PYSEC-2025-55","summary":"","modified":"2025-06-26T21:44:31.927402Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":[">=0.8.0 <0.9.0"],"fixed":["0.9.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}