CVE-2026-93840

A flaw was found in vLLM. This vulnerability arises from incorrect validation of allowedtokenids against the tokenizer length instead of the model's output logits width. A remote attacker can exploit this by supplying token IDs that exceed the output vocabulary, which bypasses validation. This ca...

CVE-2026-93840: Improper Validation of Array Index

vLLM before 0.29.0 validates allowedtokenids against tokenizer length instead of model output logits width in SamplingParams.validateallowedtokenids. Attackers can supply token IDs above the output vocabulary that pass validation, causing LogitBiasState to corrupt GPU logits state and allow...