CVE-2026-78684: vLLM before 0.27.0 Denial of Service via DeepStream Backend
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.
Affected Software
Event History
Frequently Asked Questions
Who can exploit this issue?
An unauthenticated remote attacker can exploit it by activating the DeepStream backend at request time and submitting video content.
What is the operational impact?
The attack can initialize the process-wide GPU decode pool and bypass decode pixel limits, causing a partial denial of service for concurrent requests.
Which deployments are affected?
vLLM versions before 0.27.0 are affected when an attacker can send requests that activate DeepStream and supply video for decoding.