CVE-2025-48956CWE-400

vLLM API endpoints vulnerable to Denial of Service Attacks

High · published August 21, 2025

CVSS v3.1
7.5
EPSS
1%
Percentile
46.2
In the wild
Unconfirmed
What it is

vLLM is an inference and serving engine for large language models (LLMs). From 0.1.0 to before 0.10.1.1, a Denial of Service (DoS) vulnerability can be triggered by sending a single HTTP GET request with an extremely large header to an HTTP endpoint. This results in server memory exhaustion, potentially leading to a crash or unresponsiveness. The attack does not require authentication, making it exploitable by any remote user. This vulnerability is fixed in 0.10.1.1.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00565 · 46.2th percentile
Weakness
CWE-400 · Uncontrolled Resource Consumption
Published
2025-08-21T14:41Z
EPSS history
Timeline
  • 21 AUG 14:41Z
    vLLM API endpoints vulnerable to Denial of Service Attacks
    cvelistv5