---
id: CVE-2026-105755
title: vLLM is an inference and serving engine for large language models
summary: >-
  vLLM is an inference and serving engine for large language models. Prior to
  0.30.0, flash late-interaction scoring at the /score and /rerank endpoints
  derives each worker's query_key value from the caller-controlled X-Request-Id
  header. …
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:L'
cwe:
  - CWE-639
vendor: vllm-project
product: vllm
affected:
  - vllm < 030.0
published: '2026-10-05'
updated: '2026-10-05'
sourceUpdated: '2026-10-05T23:17:02.167'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-105755'
references:
  - url: >-
      https://github.com/vllm-project/vllm/commit/ee17d0d869203ef9a35ad73358a4987bba14b1fc
    label: security-advisories@github.com
  - url: 'https://github.com/vllm-project/vllm/pull/51445'
    label: security-advisories@github.com
  - url: 'https://github.com/vllm-project/vllm/releases/tag/v0.30.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/vllm-project/vllm/security/advisories/GHSA-2phq-3phc-84px
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-2phq-3phc-84px'
tags:
  - nvd
  - cve.org
  - ghsa
  - pip
ingestedAt: '2026-10-05T23:36:21.156Z'
aliases:
  - GHSA-2phq-3phc-84px
ecosystem: pip
patched:
  - vllm 0.30.0
---

## Overview

vLLM is an inference and serving engine for large language models. Prior to 0.30.0, flash late-interaction scoring at the /score and /rerank endpoints derives each worker's query_key value from the caller-controlled X-Request-Id header. A concurrent request that reuses a victim's identifier can overwrite the cached query embedding so the victim's documents are scored against the attacker's query, and shared use counters can also cause a late-interaction cache-miss error. This issue is fixed in version 0.30.0.

## Remediation

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

## Package advisory (CVE-2026-105755)

Affected packages:

- `vllm < 0.30.0`

Patched in:

- `vllm 0.30.0`

Source: https://github.com/advisories/GHSA-2phq-3phc-84px