HTTP Request Smuggling Affecting vllm package, versions [0.3.0, 0.22.0)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-VLLM-17353938
- published17 Jun 2026
- disclosed16 Jun 2026
- creditx41j
Introduced: 16 Jun 2026
NewCVE-2026-48746 (opens in a new tab)How to fix?
Upgrade vllm to version 0.22.0 or higher.
Overview
vllm is an A high-throughput and memory-efficient inference and serving engine for LLMs
Affected versions of this package are vulnerable to HTTP Request Smuggling via improper validation of the Host header in the request scope. An attacker can gain unauthorized access to API endpoints by manipulating the Host header to control the reconstructed URL path, thereby bypassing authentication checks.