CVE-2026-93989

MediumCVSS 4.3/10Last modified Sep 28, 2026

Description

vLLM through 0.29.0 fails to properly validate bad_words token indices against the model's generation output width in SamplingParams.update_from_tokenizer(). Attackers can supply out-of-bounds token indices that corrupt logits memory of concurrent requests, causing different in-flight HTTP requests to return incorrect tokens.

Metrics

CVSS 3.1 4.3/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

Weakness enumeration

CWE-129

Affected software

No affected versions have been published.

Timeline

Published: Sep 19, 2026
Last modified: Sep 28, 2026
NVD status: Analyzed

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