Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The vllm package (PyPI) versions 0.16.0 up to but not including 0.19.0 contain a server-side request forgery flaw in the batch runner's download_bytes_from_url function. Anyone who can control the batch input JSON can make the server send HTTP or HTTPS requests to arbitrary hosts, including internal services reachable from the vLLM host, because no URL validation is applied. Upgrade to vllm 0.19.0 or later.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.4 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0026, the 17th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 3 Apr 2026, 15:23 UTC Published by the maintainers as a GitHub repository advisory
- 31 Oct 2026, 14:11 UTC First seen by agentprime
- 31 Oct 2026, 14:11 UTC Confirmed by OSV
Sources
- GitHub Advisory Database: GHSA-pf3h-qjgv-vcpr
- OSV: GHSA-pf3h-qjgv-vcpr
- github.com/vllm-project/vllm/security/advisories/GHSA-pf3h-qjgv-vcpr
- nvd.nist.gov/vuln/detail/CVE-2026-34753
- github.com/vllm-project/vllm/pull/38482
- github.com/vllm-project/vllm/commit/57861ae48d3493fa48b4d7d830b7ec9f995783e7
- github.com/advisories/GHSA-pf3h-qjgv-vcpr
- github.com/pypa/advisory-database/tree/main/vulns/vllm/PYSEC-2026-3410.yaml
- github.com/vllm-project/vllm
- pypi.org/project/vllm