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CVE-2025-48956

7.5 · HIGH

vLLM is an inference and serving engine for large language models (LLMs).

Published Aug 21, 2025CWE-400EPSS 0.56%

Overview

CVE-2025-48956 is a high-severity vulnerability. It was published on August 21, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/vllm-project/vllm/commit/d8b736f913a59117803d6701521d2e4861701944GitHubgithub.com/vllm-project/vllm/pull/23267GitHubgithub.com/vllm-project/vllm/security/advisories/GHSA-rxc4-3w6r-4v47

How CyberStrike helps

Frequently asked questions

What is CVE-2025-48956?

CVE-2025-48956 is a high-severity vulnerability. It was published on August 21, 2025 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2025-48956?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-48956?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-48956?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-48956 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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