CVE-2025-48943
Medium
Description
vLLM is an inference and serving engine for large language models (LLMs). Version 0.8.0 up to but excluding 0.9.0 have a Denial of Service (ReDoS) that causes the vLLM server to crash if an invalid regex was provided while using structured output. This vulnerability is similar to GHSA-6qc9-v4r8-22xg/CVE-2025-48942, but for regex instead of a JSON schema. Version 0.9.0 fixes the issue.
SeverityMedium
CVSS6.5
Exploit probability—
ProductVllm
PublishedMay 30, 2025
First seenMay 30, 2025
Weakness typeCWE-248CWE-248
How to fix
Update
- vllm vllm0.9.0 or later
- vllm0.9.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| vllm vllm | 0.8.0 ≤ v < 0.9.0 | 0.9.0 |
| vllmPyPI | 0.8.0 ≤ v < 0.9.0 | 0.9.0 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.