vLLMPublished 25 Oct 2026NVD status: Received

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.

ComponentvLLM
Severitymedium (CVSS 5.9)
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Published (NVD)2026-10-25
Affected versions
>= 0.20.0, < 0.30.0
from the CVE Program record written by the CNA that assigned the CVE
Fixed in0.30.0
WeaknessCWE-20
CISA KEVnot listed

NVD description

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.

What to do

  • Upgrade vLLM to 0.30.0 or later.
  • Do not expose the component's API or UI to the internet without authentication in front of it.

Sources

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