CVE-2020-14343

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.

• CWE-20
• CWE-20

• https://bugzilla.redhat.com/show_bug.cgi?id=1860466Issue Tracking, Third Party Advisory
• https://github.com/SeldonIO/seldon-core/issues/2252
• https://github.com/yaml/pyyaml/issues/420
• https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
• https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=1860466Issue Tracking, Third Party Advisory
• https://github.com/SeldonIO/seldon-core/issues/2252
• https://github.com/yaml/pyyaml/issues/420
• https://www.oracle.com/security-alerts/cpuapr2022.htmlPatch, Third Party Advisory
• https://www.oracle.com/security-alerts/cpujul2022.htmlPatch, Third Party Advisory

Published

Feb 9, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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