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OpenAdvisories
High · 7.5 CVE-2025-48956 EUVD-2025-25446GHSA-rxc4-3w6r-4v47PYSEC-2026-2021

vLLM API endpoints vulnerable to Denial of Service Attacks

Published Aug 21, 2025 · Updated Aug 21, 2025 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
vllm-project vllm >= 0.1.0, < 0.10.1.1 —

Affected packages

EcosystemPackageAffectedFixedRecord
PyPI vllm >= 0.1.0, < 0.10.1.1 0.10.1.1 GHSA-rxc4-3w6r-4v47

References