CVE-2026-34753

vLLM affected by Server-Side Request Forgery (SSRF) in `download_bytes_from_url `

At a glance

Severity: MEDIUM 5.4
EPSS: EPSS 0.25 % · percentile 16 (2026-10-27)
State: PUBLISHED
Published: 2026-04-06
Updated: 2026-04-07
Assigner: GitHub_M
NVD status: Analyzed

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	MEDIUM 5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L	GitHub_M
CVSS 3.1	MEDIUM 5.4	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L	NVD · security-advisories@github.com (Secondary)

Weaknesses (CWE)

CWE-918

Advisories

GHSA-pf3h-qjgv-vcpr — vLLM: Server-Side Request Forgery (SSRF) in `download_bytes_from_url `
PYSEC-2026-3410 — vLLM: Server-Side Request Forgery (SSRF) in `download_bytes_from_url `

European references

ENISA EUVD · EUVD-2026-19349
GCVE · GCVE-0-2026-34753

Affected configurations (NVD CPE)

cpe:2.3:a:vllm:vllm:*:*:*:*:*:*:*:* ≥ 0.16.0 < 0.19.0

Affected products

Product	Versions
vllm-project · vllm	affected >= 0.16.0, < 0.19.0

References

https://github.com/vllm-project/vllm/security/advisories/GHSA-pf3h-qjgv-vcpr

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD