CVE-2026-78684

Weakness

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.

References

• https://github.com/vllm-project/vllm/commit/e23b19309b8705b21c3b3ff4129c9974ba15a419
• https://github.com/vllm-project/vllm/security/advisories/GHSA-cqm8-jxg6-fqfq
• https://www.vulncheck.com/advisories/vllm-before-denial-of-service-via-deepstream-backend