CVE-2026-73558: vLLM is an inference and serving engine for large language models. Prior to 0.27.0, an integer overflow in blockIdx.x *

vLLM is an inference and serving engine for large language models that had an integer overflow bug (a math error where a number gets too large for its storage space) in versions before 0.27.0. This bug could cause one user's AI inference result (the AI's output) to leak to another user processing a request in the same batch, exposing private data.