CVE-2025-71379
MEDIUM EPSS 23.9%
Published Jun 20, 20261w ago · Modified Jun 22, 20261w ago
5.3 CVSS 4.0
Published Jun 20, 2026 1w ago
Last Modified Jun 22, 2026 1w ago
Description
vLLM 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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope X
Threat Intelligence
EPSS Exploit Probability
23.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-1333
References 2
- github.com https://github.com/vllm-project/vllm/security/advisories/GHSA-j828-28rj-hfhp
- vulncheck.com https://www.vulncheck.com/advisories/vllm-regular-expression-denial-of-service-in-multiple-components
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.