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A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor.
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CVE-2020-1747 (High) detected in PyYAML-3.13.tar.gz
CVE-2020-1747 (Critical) detected in PyYAML-3.13.tar.gz
Jul 27, 2023
CVE-2020-1747 - Critical Severity Vulnerability
Vulnerable Library - PyYAML-3.13.tar.gz
YAML parser and emitter for Python
Library home page: https://files.pythonhosted.org/packages/9e/a3/1d13970c3f36777c583f136c136f804d70f500168edc1edea6daa7200769/PyYAML-3.13.tar.gz
Path to dependency file: /requirements.txt
Path to vulnerable library: /requirements.txt
Dependency Hierarchy:
Found in HEAD commit: 945ffa9a528f7119f1323e4e6bdc3cae842ee96a
Found in base branch: master
Vulnerability Details
A vulnerability was discovered in the PyYAML library in versions before 5.3.1, where it is susceptible to arbitrary code execution when it processes untrusted YAML files through the full_load method or with the FullLoader loader. Applications that use the library to process untrusted input may be vulnerable to this flaw. An attacker could use this flaw to execute arbitrary code on the system by abusing the python/object/new constructor.
Publish Date: 2020-03-24
URL: CVE-2020-1747
CVSS 3 Score Details (9.8)
Base Score Metrics:
Suggested Fix
Type: Upgrade version
Origin: GHSA-6757-jp84-gxfx
Release Date: 2020-03-24
Fix Resolution: pyyaml - 5.3.1
⛑️ Automatic Remediation is available for this issue
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