Improper input validation in Vllm-Project Vllm
CVE-2026-116173
vLLM from 0.22.0 before 0.24.0 contains a denial of service vulnerability that allows remote attackers to terminate EngineCore by bypassing logprob_token_ids limits in the Rust gRPC frontend. Attackers can send Generate or GenerateStream requests with output_logprobs enabled and more than 128 output_candidates.token_ids, triggering a fatal sampler exception that crashes the engine.
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-6pgw-f3pv-4h8q (vendor-advisory)
- www.vulncheck.com/advisories/vllm-0.22.0-before-0.24.0-denial-of-service-via-gr… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116173?
- CVE-2026-116173 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-2026-116173?
- Medium severity. CVSS v3 base score is 5.9 out of 10.