Timing Attack Affecting vllm package, versions [,0.9.0)


Severity

Recommended
0.0
medium
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Proof of Concept
EPSS
0.03% (6th percentile)

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  • Snyk IDSNYK-PYTHON-VLLM-10300813
  • published5 Jun 2025
  • disclosed29 May 2025
  • creditUnknown

Introduced: 29 May 2025

CVE-2025-46570  (opens in a new tab)
CWE-208  (opens in a new tab)

How to fix?

Upgrade vllm to version 0.9.0 or higher.

Overview

vllm is an A high-throughput and memory-efficient inference and serving engine for LLMs

Affected versions of this package are vulnerable to Timing Attack due to the PageAttention mechanism. An attacker can observe timing differences to infer details about the processed data by analyzing the time variations in the TTFT (Time to First Token) in environments sharing the same backend.

CVSS Base Scores

version 4.0
version 3.1