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CVE-2026-78684 vLLM before 0.27.0 fails to properly classify DeepStream as a GPU backend and omits pixel-limit enforcement in its…

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.

Affected products and versions

Product Affected versions Fixed in
vllm 0.27 earliest → < 0.27.0 0.27.0
The 121 CVEs of vllm →
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