CVE-2026-116178

MEDIUM 5.9

vLLM 0.20.0 before 0.30.0 DoS via /inference/v1/generate mm_placeholders

CVSS Score

5.9

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-20
Vendor	vllm-project
Product	vllm
Published	Oct 25, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Affected Versions

vllm-project / vllm

0.20.0 < 0.30.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/vllm-project/vllm/security/advisories/GHSA-34qw-q2h2-jp3m vulncheck.com: https://www.vulncheck.com/advisories/vllm-0.20.0-before-0.30.0-dos-via-inference-v1-generate-mm-placeholders

Credits

🔍 JSGforever jperezdealgaba