PyGithub 1.53 Vulnerabilities: A Detailed Security Analysis

by Alex Johnson 60 views

In this article, we will delve into the security vulnerabilities identified in the PyGithub-1.53-py3-none-any.whl library. This library, which facilitates interaction with the GitHub API v3, is a crucial tool for many developers. However, like any software, it is susceptible to security flaws. Understanding these vulnerabilities is essential for maintaining the security and integrity of your projects.

Understanding the Vulnerabilities in PyGithub 1.53

When integrating the PyGithub library into your projects, it's crucial to be aware of the potential security implications. Our security analysis has revealed that version 1.53 of PyGithub-1.53-py3-none-any.whl has six vulnerabilities, with the highest severity rated at 7.5. These vulnerabilities, if exploited, could pose significant risks to your applications. Therefore, understanding the nature of these vulnerabilities and implementing the recommended fixes is of paramount importance.

Vulnerability Overview

The PyGithub-1.53-py3-none-any.whl library has been found to have six vulnerabilities, with the highest severity being 7.5. These vulnerabilities span across different severity levels and impact various components of the library and its dependencies. Let's examine each vulnerability in detail:

Finding Severity 🎯 CVSS Exploit Maturity EPSS Library Type Fixed in Remediation Available
CVE-2021-33503 🔴 High 7.5 Not Defined < 1% urllib3-1.24.3-py2.py3-none-any.whl Transitive N/A ❌
CVE-2022-29217 🔴 High 7.4 Not Defined < 1% PyJWT-2.1.0-py3-none-any.whl Transitive N/A ❌
CVE-2022-23491 🟠 Medium 6.8 Not Defined < 1% certifi-2021.5.30-py2.py3-none-any.whl Transitive N/A ❌
CVE-2020-26137 🟠 Medium 6.5 Not Defined < 1% urllib3-1.24.3-py2.py3-none-any.whl Transitive N/A ❌
CVE-2025-50181 🟠 Medium 5.3 Not Defined < 1% urllib3-1.24.3-py2.py3-none-any.whl Transitive N/A ❌
CVE-2025-50182 🟠 Medium 5.3 Not Defined < 1% urllib3-1.24.3-py2.py3-none-any.whl Transitive N/A ❌

High Severity Vulnerabilities

1. CVE-2021-33503: High Severity in urllib3

This high-severity vulnerability, with a CVSS score of 7.5, affects the urllib3 library, specifically version 1.24.3. Urllib3 is a Python HTTP client library that provides features like thread-safe connection pooling and file posting. This vulnerability can lead to a denial-of-service (DoS) attack. Let's discuss the vulnerability details, its impact, and the recommended remediation.

The vulnerability arises due to catastrophic backtracking in the regular expression used to parse URLs. When a URL containing numerous @ characters in the authority component is provided, the regular expression parsing the authority component can cause catastrophic backtracking. This leads to excessive consumption of computational resources, resulting in a denial of service if a malicious URL is passed as a parameter or via an HTTP redirect.

Dependency Hierarchy:

  • PyGithub-1.53-py3-none-any.whl (Root Library)
    • requests-2.26.0-py2.py3-none-any.whl
      • ❌ urllib3-1.24.3-py2.py3-none-any.whl (Vulnerable Library)

Vulnerability Details:

  • Publish Date: June 29, 2021, 10:55 AM
  • URL: CVE-2021-33503
  • Threat Assessment:
    • Exploit Maturity: Not Defined
    • EPSS: < 1%
    • Score: 7.5

Suggested Fix:

2. CVE-2022-29217: High Severity in PyJWT

This high-severity vulnerability, with a CVSS score of 7.4, is found in the PyJWT library, specifically version 2.1.0. PyJWT is a Python library for encoding and decoding JSON Web Tokens (JWT). This vulnerability can allow an attacker to bypass authentication if not handled correctly.

PyJWT supports multiple JWT signing algorithms. The library requires the application to specify which algorithms are supported. If the application uses jwt.algorithms.get_default_algorithms() to support all algorithms, an attacker could potentially submit a JWT token using a different signing algorithm than expected, leading to authentication bypass. While the issue is less severe as it requires the application to explicitly use jwt.algorithms.get_default_algorithms(), it still poses a significant risk if implemented.

Dependency Hierarchy:

  • PyGithub-1.53-py3-none-any.whl (Root Library)
    • ❌ PyJWT-2.1.0-py3-none-any.whl (Vulnerable Library)

Vulnerability Details:

  • Publish Date: May 24, 2022, 02:10 PM
  • URL: CVE-2022-29217
  • Threat Assessment:
    • Exploit Maturity: Not Defined
    • EPSS: < 1%
    • Score: 7.4

Suggested Fix:

  • Type: Upgrade version
  • Workaround: Always be explicit with the algorithms that are accepted and expected when decoding.
  • Users should upgrade to v2.4.0 to receive a patch for this issue.

Medium Severity Vulnerabilities

1. CVE-2022-23491: Medium Severity in certifi

This medium-severity vulnerability, with a CVSS score of 6.8, affects the certifi library, specifically version 2021.5.30. Certifi is a curated collection of Root Certificates used for validating the trustworthiness of SSL certificates. The vulnerability involves the removal of root certificates from