CVE-2026-116172

Medium

Description

vLLM from 0.22.0 before 0.24.0 contains an improper input validation vulnerability in the Rust gRPC converter that allows remote attackers to bypass max_logprobs limits via CandidateTokens.top_n. Attackers can send Generate or GenerateStream requests with oversized or integer-wrapping top_n values to trigger torch.topk failures that terminate EngineCore.

SeverityMedium

CVSS5.9

Exploit probability—

ProductVllm

PublishedOct 25, 2026

First seenOct 25, 2026

Weakness typeCWE-20Improper input validation

How to fix

Update

vllm vllm0.24.0 or later

Vendor advisories

github.com/vllm-project/vllm/security/advisories/GHSA-rwfw-xvg3-3937

Affected products

Product	Affected versions	Fixed in
vllm vllm	0.22.0 ≤ v < 0.24.0	0.24.0

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