CVE-2025-48956 – Apache vLLM HTTP Header DoS Vulnerability

The following table lists the changes that have been made to the
CVE-2025-48956 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution
of a vulnerability, and for identifying the most recent changes that may
impact the vulnerability’s severity, exploitability, or other characteristics.

  • New CVE Received
    by [email protected]

    Aug. 21, 2025

    Action Type Old Value New Value
    Added 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.
    Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Added CWE CWE-400
    Added Reference https://github.com/vllm-project/vllm/commit/d8b736f913a59117803d6701521d2e4861701944
    Added Reference https://github.com/vllm-project/vllm/pull/23267
    Added Reference https://github.com/vllm-project/vllm/security/advisories/GHSA-rxc4-3w6r-4v47
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