{"schemaVersion":3,"id":"GHSA-VFM7-4H43-GP6M","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Duplicate Advisory: vLLM Vulnerable to Regular Expression Denial of Service\n\n### Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-j828-28rj-hfhp. This link is maintained to preserve external references.\n\n### Original Description\n\nvLLM versions >= 0.6.3 and < 0.9.0 contain multiple regular expression denial of service (ReDoS) vulnerabilities. Several regex patterns — in vllm/lora/utils.py, the phi4mini tool parser, and the OpenAI-compatible serving chat endpoint — are susceptible to catastrophic backtracking. An attacker submitting crafted input with nested or repeated structures can trigger severe CPU consumption and performance degradation, resulting in denial of service.","dates":{"published":"2026-06-20T21:31:21.000Z","modified":"2026-09-11T16:02:22.806Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":5.3,"severity":"medium","version":"4.0","versionLabel":"v4.0","source":"OSV · Pypi","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","computed":true,"selection":"version-preference"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"OSV · Pypi","score":5.3,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Pypi","score":4.3,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","exploitability":7.2,"impact":2.3,"computed":true}]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"PyPI","product":"vllm","name":"vllm","label":"vllm","ecosystem":"PyPI","cpePart":null,"purl":"pkg:pypi/vllm","purlType":"pypi","versions":[{"text":"≥ 0.6.3, < 0.9.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 0.6.3, < 0.9.0","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-j828-28rj-hfhp","label":"github.com/vllm-project/vllm/security/advisories/GHSA-j828-28rj-hfhp","hostname":"github.com","tags":["WEB"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71379","label":"nvd.nist.gov/vuln/detail/CVE-2025-71379","hostname":"nvd.nist.gov","tags":["Advisory"]},{"url":"https://github.com/vllm-project/vllm","label":"github.com/vllm-project/vllm","hostname":"github.com","tags":["PACKAGE"]},{"url":"https://www.vulncheck.com/advisories/vllm-regular-expression-denial-of-service-in-multiple-components","label":"www.vulncheck.com/advisories/vllm-regular-expression-denial-of-service-in-multiple-components","hostname":"www.vulncheck.com","tags":["WEB"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-06-20T21:31:21.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-09-11T16:02:22.806Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":21,"level":"low","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T04:12:54.703Z","stale":false,"partial":false}}