CVE-2026-93592

High

Description

vLLM versions before 0.28.0 fail to validate the lower bound of token IDs in the /v1/embeddings and /pooling endpoints, allowing unauthenticated attackers to crash the engine by submitting negative token IDs. A single request with a negative token ID triggers a CUDA device-side assertion that poisons the GPU context, causing all subsequent requests to fail until the process restarts.

SeverityHigh

CVSS7.5

Exploit probability—

ProductVllm

PublishedSep 18, 2026

First seenSep 18, 2026

Weakness typeCWE-129CWE-129

How to fix

Update

vllm vllm0.28.0 or later
vllm0.28.0 or later

Vendor advisories

github.com/vllm-project/vllm/security/advisories/GHSA-25q3-v2hm-8vpf

Affected products

Product	Affected versions	Fixed in
vllm vllm	v < 0.28.0	0.28.0
vllmPyPI	v < 0.28.0	0.28.0

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