{"cve":"CVE-2025-48887","nvd":{"published":"2025-05-30T18:15:32.500","modified":"2026-06-17T09:30:26.173","status":"Analyzed","description":"vLLM, an inference and serving engine for large language models (LLMs), has a Regular Expression Denial of Service (ReDoS) vulnerability in the file `vllm/entrypoints/openai/tool_parsers/pythonic_tool_parser.py` of versions 0.6.4 up to but excluding 0.9.0. The root cause is the use of a highly complex and nested regular expression for tool call detection, which can be exploited by an attacker to cause severe performance degradation or make the service unavailable. The pattern contains multiple nested quantifiers, optional groups, and inner repetitions which make it vulnerable to catastrophic backtracking. Version 0.9.0 contains a patch for 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-1333"],"references":["https://github.com/vllm-project/vllm/commit/4fc1bf813ad80172c1db31264beaef7d93fe0601","https://github.com/vllm-project/vllm/pull/18454","https://github.com/vllm-project/vllm/security/advisories/GHSA-w6q7-j642-7c25","https://github.com/vllm-project/vllm/security/advisories/GHSA-w6q7-j642-7c25"],"products":["vllm:vllm"],"source":"nvd","synced_at":"2026-10-19T22:02:23.998251710+00:00"},"epss":{"cve":"CVE-2025-48887","score":0.00541,"percentile":0.45493,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-w6q7-j642-7c25","url":"https://osv.dev/vulnerability/GHSA-w6q7-j642-7c25","summary":"vLLM has a Regular Expression Denial of Service (ReDoS, Exponential Complexity) Vulnerability in `pythonic_tool_parser.py`","modified":"2026-08-07T08:12:04.723988051Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":[">=0.6.4 <0.9.0"],"fixed":["0.9.0"]}]},{"id":"PYSEC-2025-50","url":"https://osv.dev/vulnerability/PYSEC-2025-50","summary":"","modified":"2026-06-10T17:14:19.371824623Z","packages":[{"ecosystem":"PyPI","name":"vllm","purl":"pkg:pypi/vllm","ranges":[">=0.6.4 <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."]}