Improper input validation in Vllm-Project Vllm
CVE-2026-116174
vLLM from 0.22.0 before 0.24.0 contains an improper input validation vulnerability in the Rust gRPC Generate and GenerateStream service that forwards unchecked prompt token IDs to EngineCore. Attackers can submit requests with out-of-vocabulary prompt.token_ids values to trigger a fatal embedding lookup failure that terminates EngineCore and leaves the server unhealthy.
Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)
Published .
CVSS v3 metric
CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/vllm-project/vllm/security/advisories/GHSA-w2v2-5662-8v5q (vendor-advisory)
- www.vulncheck.com/advisories/vllm-0.22.0-before-0.24.0-denial-of-service-via-ru… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116174?
- CVE-2026-116174 is a medium-severity vulnerability in Vllm-Project Vllm, classified under Improper Input Validation. CVSS score: 5.9/10. Published 2026-10-25.
- How severe is CVE-2026-116174?
- Medium severity. CVSS v3 base score is 5.9 out of 10.