CVE-2026-56340

CVE-2026-56340 · vLLM - Denial of Service via Unvalidated Multimodal Embeddings

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vLLM versions >= 0.10.2 and < 0.13.0 are missing sparse tensor validation in multimodal embeddings processing. Because PyTorch disables sparse tensor invariant checks by default, an attacker can submit crafted embedding requests with malformed (negative or out-of-bounds) tensor indices, when the prompt-embeds feature is enabled, to trigger crashes or resource exhaustion (denial of service), with potential for out-of-bounds/write-what-where memory corruption. This continues CVE-2025-62164, whose prior fix only disabled the feature by default rather than addressing the root cause.

CVSS 8.7 · Élevée · EPSS 0,6% · Correctif disponible

Publication

2026-06-20T18:27:10.148Z

Mise à jour

2026-07-22T12:08:41.474Z

Pile logicielle: python

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