---
id: CVE-2026-116173
title: >-
  vLLM 0.22.0 before 0.24.0 Denial of Service via gRPC
  output_candidates.token_ids
summary: >-
  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…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-20
vendor: vllm-project
product: vllm
affected:
  - vllm >= 0.22.0 < 0.24.0
published: '2026-10-25'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T13:20:14.431Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116173'
references:
  - url: >-
      https://github.com/vllm-project/vllm/security/advisories/GHSA-6pgw-f3pv-4h8q
    label: GitHub Security Advisory (GHSA-6pgw-f3pv-4h8q)
  - url: >-
      https://www.vulncheck.com/advisories/vllm-0.22.0-before-0.24.0-denial-of-service-via-grpc-output-candidates-token-ids
    label: >-
      VulnCheck Advisory: vLLM 0.22.0 before 0.24.0 Denial of Service via gRPC
      output_candidates.token_ids
tags:
  - cve.org
ingestedAt: '2026-10-25T22:08:29.947Z'
---

## Overview

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.

## Affected

- `vllm >= 0.22.0 < 0.24.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.