{"id":"GHSA-vfm7-4h43-gp6m","title":"Duplicate Advisory: vLLM Vulnerable to Regular Expression Denial of Service","summary":"Duplicate Advisory: vLLM Vulnerable to Regular Expression Denial of Service","severity":"medium","cvss":4.3,"cwe":["CWE-1333"],"vendor":"vllm","product":"vllm","ecosystem":"pip","affected":["vllm >= 0.6.3, < 0.9.0"],"patched":["vllm 0.9.0"],"published":"2026-06-20","updated":"2026-09-11","sourceUpdated":"2026-09-11T15:45:35Z","source":"GHSA","sourceUrl":"https://github.com/advisories/GHSA-vfm7-4h43-gp6m","references":[{"url":"https://github.com/vllm-project/vllm/security/advisories/GHSA-j828-28rj-hfhp"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-71379"},{"url":"https://www.vulncheck.com/advisories/vllm-regular-expression-denial-of-service-in-multiple-components"},{"url":"https://github.com/advisories/GHSA-vfm7-4h43-gp6m"}],"tags":["ghsa","pip"],"ingestedAt":"2026-09-11T16:45:47.862Z","slug":"GHSA-vfm7-4h43-gp6m","body":"## Overview\n\n### Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-j828-28rj-hfhp.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.\n\n## Affected packages\n\n- `vllm >= 0.6.3, < 0.9.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `vllm 0.9.0`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}