CVE-2025-71379
MEDIUM
4.3
CVSS 3.1
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.
Metadata
Severity & Metrics
4.3
MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Affected products (1)
| Vendor | Product | Platform | Versions |
|---|---|---|---|
| vllm | vllm | — | 0.6.3 < 0.9.0, 0.9.0 |
Weakness (CWE)
| CWE | Source | Description |
|---|---|---|
| CWE-1333 | cna | Inefficient Regular Expression Complexity |
CVSS scores (2)
| Score | Severity | Version | Source | Vector |
|---|---|---|---|---|
| 5.3 | MEDIUM | 4.0 | cna | 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 |
| 4.3 | MEDIUM | 3.1 | cna | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
References (2)
- GHSA Advisory GHSA-j828-28rj-hfhp https://github.com/vllm-project/vllm/security/advisories/GHSA-j828-28rj-hfhp
- VulnCheck Advisory: vllm - Regular Expression Denial of Service in Multiple Components https://www.vulncheck.com/advisories/vllm-regular-expression-denial-of-service-in-multiple-components