HTTP vulnerability

CVE-2025-43859: Request Smuggling Vulnerability in Python’s h11 HTTP Library

CVE-2025-43859: Request Smuggling Vulnerability in Python’s h11 HTTP Library

Do Son April 27, 2025

A CVE-2025-43859 vulnerability in Python’s h11 library may lead to request smuggling attacks when paired with buggy proxies. Patch to version 0.15.0 now.

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