Improper input validation in Vllm-Project Vllm
CVE-2026-116178
vLLM from 0.20.0 before 0.30.0 contains a denial of service vulnerability that allows remote attackers to crash the engine by sending inconsistent multimodal metadata to the disaggregated /inference/v1/generate endpoint. Attackers can replay a valid multimodal item with repeated or overlapping mm_placeholders ranges or mismatched kwargs_data and mm_hashes lists, producing a negative text span in Qwen2.5-VL position construction that terminates 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-34qw-q2h2-jp3m (vendor-advisory)
- www.vulncheck.com/advisories/vllm-0.20.0-before-0.30.0-dos-via-inference-v1-gen… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116178?
- CVE-2026-116178 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-2026-116178?
- Medium severity. CVSS v3 base score is 5.9 out of 10.