CVE-2025-48956 Details
Description
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.
A denial-of-service vulnerability has been identified in vLLM, an inference and serving engine for large language models. This issue affects versions 0.1.0 prior to 0.10.1.1. The vulnerability can be triggered by sending a single HTTP GET request with an extremely large header to an HTTP endpoint. This leads to server memory exhaustion, causing potential crashes or unresponsiveness. The attack does not require authentication, making it exploitable by any remote user.
Users can upgrade to vLLM version 0.10.1.1 or later, which includes default protections against this type of header abuse. Alternatively, a proxy can be used in front of vLLM to provide similar protection.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Aug 21, 2025References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| vllm vllm | >= 0.1.0, < 0.10.1.1 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Oct 9, 2025 | Initial Analysis | [email protected] |
| Aug 21, 2025 | New CVE Received | [email protected] |