📦 Urllib3

by Python

🔍 What is Urllib3?

Description coming soon...

🛡️ Security Overview

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⚠️ Known Vulnerabilities

CVE-2026-21441

HIGH CVSS 7.5 Jan 7, 2026

This vulnerability in urllib3 allows a malicious server to cause excessive resource consumption on clients through decompression bombs in HTTP redirect responses. It affects Python applications using ...

CVE-2025-66471

HIGH CVSS 7.5 Dec 5, 2025

CVE-2025-66471 is a resource exhaustion vulnerability in urllib3's streaming API that occurs when processing highly compressed HTTP responses. Attackers can send specially crafted compressed data caus...

CVE-2025-66418

HIGH CVSS 7.5 Dec 5, 2025

This vulnerability in urllib3 allows a malicious HTTP server to send specially crafted compressed responses that cause excessive CPU usage and memory allocation during decompression. It affects Python...

CVE-2025-50181

MEDIUM CVSS 5.3 Jun 19, 2025

This CVE describes a vulnerability in urllib3 where disabling redirects at the PoolManager level fails to properly mitigate SSRF or open redirect attacks. Applications that rely on this method for sec...

CVE-2024-37891

MEDIUM CVSS 4.4 Jun 17, 2024

urllib3's CVE-2024-37891 allows the Proxy-Authorization header to leak during cross-origin redirects when configured incorrectly without using urllib3's built-in proxy support. This could expose proxy...