CVE-2026-78684

Medium

Description

vLLM before 0.27.0 fails to properly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path. Unauthenticated attackers can activate DeepStream at request time to initialize the process-wide GPU decode pool and submit video that bypasses resource controls, causing partial denial of service for concurrent requests.

SeverityMedium

CVSS5.3

Exploit probability—

ProductVllm

PublishedAug 25, 2026

First seenAug 25, 2026

Weakness typeCWE-400Uncontrolled resource consumption

How to fix

Update

vllm vllm0.27.0 or later
vllm0.27.0 or later

Patches

github.com/vllm-project/vllm/commit/e23b19309b8705b21c3b3ff4129c9974ba15a419

Vendor advisories

github.com/vllm-project/vllm/security/advisories/GHSA-cqm8-jxg6-fqfq

Affected products

Product	Affected versions	Fixed in
vllm vllm	v < 0.27.0	0.27.0
vllmPyPI	v < 0.27.0	0.27.0

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