Allocation of Resources Without Limits or Throttling Affecting python-pip package, versions <20.0.2-5ubuntu1.11+esm4


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

Social Trends
EPSS
0.69% (50th percentile)

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  • Snyk IDSNYK-UBUNTU2004-PYTHONPIP-14222535
  • published11 Dec 2025
  • disclosed5 Dec 2025

Introduced: 5 Dec 2025

CVE-2025-66418  (opens in a new tab)
CWE-770  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 python-pip to version 20.0.2-5ubuntu1.11+esm4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python-pip package and not the python-pip package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leading to high CPU usage and massive memory allocation for the decompressed data. This vulnerability is fixed in 2.6.0.

CVSS Base Scores

version 3.1