CVE-2026-54235: Vllm

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

vLLM is an inference and serving engine for large language models (LLMs). Prior to 0.23.1rc0, ll temperature validation gates use comparison operators (<, >), which silently evaluate to False for NaN and for positive Infinity in Python's IEEE 754 float semantics. Both values pass every guard and propagate to GPU sampling kernels, where they produce undefined behavior or CUDA errors that can crash the inference worker. This vulnerability is fixed in 0.23.1rc0.

Affected products

• Vllm Vllm: before 0.23.1 (fixed in 0.23.1)

Published 2026-06-22. Last modified 2026-06-24.