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Critical severityNVD Advisory· Published Feb 9, 2021· Updated Aug 4, 2024

CVE-2020-14343

CVE-2020-14343

Description

A vulnerability was discovered in the PyYAML library in versions before 5.4, 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. This flaw allows an attacker to execute arbitrary code on the system by abusing the python/object/new constructor. This flaw is due to an incomplete fix for CVE-2020-1747.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
PyYAMLPyPI
< 5.45.4

Affected products

708

Patches

Vulnerability mechanics

References

11

News mentions

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