What’s Vulnerable › Vulnerabilities
CVE-2026-34753: vLLM affected by Server-Side Request Forgery (SSRF) in `download_bytes_from_url `
- Severity: medium (CVSS 5.4 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-04-06 · updated 2026-06-17
- Weakness: CWE-918
Description
vLLM is an inference and serving engine for large language models (LLMs). From 0.16.0 to before 0.19.0, a server-side request forgery (SSRF) vulnerability in download_bytes_from_url allows any actor who can control batch input JSON to make the vLLM batch runner issue arbitrary HTTP/HTTPS requests from the server, without any URL validation or domain restrictions. This can be used to target internal services (e.g. cloud metadata endpoints or internal HTTP APIs) reachable from the vLLM host. This vulnerability is fixed in 0.19.0.
Affected products
- vllm-project vllm: from 0.16.0 before 0.19.0 — fixed in 0.19.0
How to fix
Upgrade to a fixed version: vllm-project vllm 0.19.0. Check the vendor advisory for mitigations.
References
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