CVE-2025-46570

Name: CVE-2025-46570
Creator: NVD / NIST
Published: 2025-05-29T17:15:21.327+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.6/10EPSS 0.25%

Last modified Jun 17, 2026

CVE-2025-46570 is a low-severity vulnerability rated 2.6/10 on the CVSS scale. vLLM is an inference and serving engine for large language models (LLMs). Prior to version 0.9.0, when a new prompt is processed, if the PageAttention mechanism finds a matching prefix chunk, the prefill process speeds up, which is reflected in the TTFT (Time to First Token). EPSS estimates a 0.25% chance of exploitation in the next 30 days.

Description

vLLM is an inference and serving engine for large language models (LLMs). Prior to version 0.9.0, when a new prompt is processed, if the PageAttention mechanism finds a matching prefix chunk, the prefill process speeds up, which is reflected in the TTFT (Time to First Token). These timing differences caused by matching chunks are significant enough to be recognized and exploited. This issue has been patched in version 0.9.0.

Metrics

CVSS 3.1

2.6/10

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

EPSS Probability

0.25%

16.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Vllm	Vllm	< 0.9.0

References

https://github.com/vllm-project/vllm/commit/77073c77bc2006eb80ea6d5128f076f5e6c6f54fPatch
https://github.com/vllm-project/vllm/pull/17045Issue Tracking, Vendor Advisory
https://github.com/vllm-project/vllm/security/advisories/GHSA-4qjh-9fv9-r85rVendor Advisory

Timeline

Published: May 29, 2025
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2025-46570?

How severe is CVE-2025-46570?

CVE-2025-46570 has a CVSS score of 2.6/10 (LOW severity). The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.

How do I fix CVE-2025-46570?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2025-46570?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST