CVE-2026-78684: vLLM DeepStream backend classification flaw enables denial of service

Summary

CVE-2026-78684 affects vLLM before 0.27.0, which fails to classify DeepStream as a GPU backend and omits pixel-limit enforcement in its decode path. An unauthenticated attacker can activate DeepStream at request time, initialize the process-wide GPU decode pool, and submit video that bypasses resource controls, causing partial denial of service for concurrent requests. VulnCheck rates it CVSS 4.0 6.9 (MEDIUM); NVD has not yet provided an assessment.

Mitigation

The source does not state a fix yet. Check the original advisory for updates.

Topics

• Inference infrastructure

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