CVE-2024-8939
Vllm: denials of service in vllm json web api
CVSS Score
6.2
EPSS Score
0.0%
EPSS Percentile
0th
A vulnerability was found in the ilab model serve component, where improper handling of the best_of parameter in the vllm JSON web API can lead to a Denial of Service (DoS). The API used for LLM-based sentence or chat completion accepts a best_of parameter to return the best completion from several options. When this parameter is set to a large value, the API does not handle timeouts or resource exhaustion properly, allowing an attacker to cause a DoS by consuming excessive system resources. This leads to the API becoming unresponsive, preventing legitimate users from accessing the service.
| CWE | CWE-400 |
| Published | Sep 17, 2024 |
| Last Updated | Nov 20, 2025 |
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CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Red Hat / Red Hat Enterprise Linux AI (RHEL AI)
All versions affected Red Hat / Red Hat Enterprise Linux AI (RHEL AI)
All versions affected References
Credits
Red Hat would like to thank Thibault Guittet for reporting this issue.