CVE-2026-116173

HighCVSS 7.5/10Last modified Oct 28, 2026

Description

vLLM from 0.22.0 before 0.24.0 contains a denial of service vulnerability that allows remote attackers to terminate EngineCore by bypassing logprob_token_ids limits in the Rust gRPC frontend. Attackers can send Generate or GenerateStream requests with output_logprobs enabled and more than 128 output_candidates.token_ids, triggering a fatal sampler exception that crashes the engine.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-20

Affected software

Vendor	Product	Versions
vllm-project	vllm	>= 0.22.0, < 0.24.0

References

https://github.com/vllm-project/vllm/security/advisories/GHSA-6pgw-f3pv-4h8qMitigation, Vendor Advisory
https://www.vulncheck.com/advisories/vllm-0.22.0-before-0.24.0-denial-of-service-via-grpc-output-candidates-token-idsThird Party Advisory

Timeline

Published: Oct 25, 2026
Last modified: Oct 28, 2026
NVD status: Analyzed

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