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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alma_linux | — | Upgrade python38-pysocksUpgrade python38-chardetUpgrade python38-attrsUpgrade python38-pyUpgrade python38-wcwidthUpgrade python38-scipyUpgrade python38-markupsafeUpgrade python38-more-itertoolsUpgrade python38-cryptographyUpgrade python38-pyyamlUpgrade python38-mod_wsgiUpgrade python38-atomicwritesUpgrade python38-pyparsingUpgrade python38-psycopg2Upgrade python38-psycopg2-testsUpgrade python38-cffiUpgrade python38-pycparserUpgrade python38-plyUpgrade python38-PyMySQLUpgrade python38-pytzUpgrade python38-pluggyUpgrade python38-pytestUpgrade python38-requestsUpgrade python38-asn1cryptoUpgrade python38-idnaUpgrade python38-packagingUpgrade python38-psycopg2-docUpgrade python38-CythonUpgrade python38-six | May 4, 2022 | Feb 9, 2021 |
| Alpine Linux | — | Upgrade py3-yaml | Mar 26, 2024 | Feb 9, 2021 |
| Centos_linux | — | Upgrade python38-numpy-debuginfoUpgrade python38-pyyamlUpgrade python38-sixUpgrade python38-rpm-macrosUpgrade python38-develUpgrade python38-psycopg2-debuginfoUpgrade Cython-debugsourceUpgrade python-psycopg2-debugsourceUpgrade python38-markupsafeUpgrade python38-babelUpgrade python38-plyUpgrade python38-pytzUpgrade python38-pyyaml-debuginfoUpgrade scipy-debugsourceUpgrade python38-pipUpgrade python38-setuptoolsUpgrade python38-idleUpgrade python38-Cython-debuginfoUpgrade python38-CythonUpgrade python38-lxmlUpgrade python38-chardetUpgrade python38-debugUpgrade python38-cffi-debuginfoUpgrade python38-asn1cryptoUpgrade python38-debugsourceUpgrade python38-mod_wsgiUpgrade python-cryptography-debugsourceUpgrade python38-pysocksUpgrade python38-lxml-debuginfoUpgrade python38-jinja2Upgrade python38-scipy-debuginfoUpgrade python38-psutil-debuginfoUpgrade python38-markupsafe-debuginfoUpgrade python38-libsUpgrade python38-cffiUpgrade python38-wheelUpgrade python-cffi-debugsourceUpgrade python-psutil-debugsourceUpgrade python38-tkinterUpgrade python38-pip-wheelUpgrade python38-psycopg2-docUpgrade python38-debuginfoUpgrade python38-cryptography-debuginfoUpgrade python38-cryptographyUpgrade python38-scipyUpgrade python38Upgrade python38-testUpgrade python38-numpyUpgrade PyYAML-debugsourceUpgrade python38-psutilUpgrade numpy-debugsourceUpgrade python38-setuptools-wheelUpgrade python38-pycparserUpgrade python38-urllib3Upgrade python38-requestsUpgrade python38-numpy-f2pyUpgrade python-lxml-debugsourceUpgrade python38-wheel-wheelUpgrade python38-PyMySQLUpgrade python38-psycopg2Upgrade python38-numpy-docUpgrade python38-idnaUpgrade python-markupsafe-debugsourceUpgrade python38-psycopg2-tests | Jun 30, 2021 | Feb 9, 2021 |
| Debian | — | Upgrade pyyaml | Jul 30, 2024 | Feb 9, 2021 |
| Dell Powerstore Dsa2024462 | — | Upgrade Dell PowerStoreOS to the latest version | Oct 23, 2025 | Nov 20, 2024 |
| Dell Powerstore Dsa2025050 | — | Upgrade Dell PowerStoreOS to the latest version | Oct 23, 2025 | Jan 28, 2025 |
| Freebsd | — | Upgrade py38-yamlUpgrade py37-yamlUpgrade py36-yamlUpgrade py39-yaml | Nov 4, 2022 | Jun 2, 2021 |
| Gentoo Linux | — | Upgrade dev-python/pyyaml. | Feb 27, 2024 | Feb 9, 2021 |
| Huawei Euleros 2_0_sp5 | — | — | May 19, 2021 | Feb 9, 2021 |
| Huawei Euleros 2_0_sp8 | — | Upgrade python3-pyyamlUpgrade python2-pyyaml | Feb 2, 2021 | Feb 1, 2021 |
| Huawei Euleros 2_0_sp9 | — | Upgrade python3-pyyaml | Jun 2, 2021 | Feb 9, 2021 |
| Oracle Solaris | — | Upgrade library/python/pyyaml-37 to version 5.3.1-11.4.23.0.1.69.1 on Solaris 11.4Upgrade library/python/pyyaml-35 to version 5.3.1-11.4.23.0.1.69.1 on Solaris 11.4Upgrade legacy/library/python/pyyaml-34 to version 5.3.1-11.4.23.0.1.69.1 on Solaris 11.4Upgrade library/python/pyyaml-39 to version 5.4.1-11.4.33.0.1.94.0 on Solaris 11.4Upgrade library/python/pyyaml-27 to version 5.3.1-11.4.23.0.1.69.1 on Solaris 11.4Upgrade library/python/pyyaml to version 5.3.1-11.4.23.0.1.69.1 on Solaris 11.4Upgrade library/python/pyyaml-34 to version 5.3.1-11.4.23.0.1.69.1 on Solaris 11.4Upgrade legacy/library/python/pyyaml-35 to version 5.3.1-11.4.23.0.1.69.1 on Solaris 11.4 | Mar 17, 2021 | Feb 9, 2021 |
| Oracle_linux | — | Upgrade python38-pyyamlUpgrade python38-testUpgrade python38-CythonUpgrade python38-setuptools-wheelUpgrade python38-urllib3Upgrade python38-setuptoolsUpgrade python38Upgrade python38-babelUpgrade python38-chardetUpgrade python38-numpyUpgrade python38-psutilUpgrade python38-plyUpgrade python38-jinja2Upgrade python38-pipUpgrade python38-mod_wsgiUpgrade python38-psycopg2-docUpgrade python38-cffiUpgrade python38-markupsafeUpgrade python38-asn1cryptoUpgrade python38-wheel-wheelUpgrade python38-wheelUpgrade python38-libsUpgrade python38-idnaUpgrade python38-develUpgrade python38-rpm-macrosUpgrade python38-sixUpgrade python38-cryptographyUpgrade python38-pycparserUpgrade python38-idleUpgrade python38-debugUpgrade python38-scipyUpgrade python38-pysocksUpgrade python38-numpy-docUpgrade python38-pytzUpgrade python38-lxmlUpgrade python38-PyMySQLUpgrade python38-tkinterUpgrade python38-requestsUpgrade python38-psycopg2-testsUpgrade python38-psycopg2Upgrade python38-pip-wheelUpgrade python38-numpy-f2py | Jul 2, 2021 | Jul 22, 2020 |
| Redhat_linux | — | Upgrade python38-cryptography-debuginfoUpgrade python-markupsafe-debugsourceUpgrade python-cryptography-debugsourceUpgrade python38-PyMySQLUpgrade python38-wheelUpgrade python38-atomicwritesUpgrade python38-idnaUpgrade python38-numpy-f2pyUpgrade python38-asn1cryptoUpgrade python38-lxmlUpgrade python38-pycparserUpgrade python38-psutil-debuginfoUpgrade python38-develUpgrade python38-pluggyUpgrade python38-pysocksUpgrade python38-markupsafe-debuginfoUpgrade python38-wheel-wheelUpgrade python38-debugUpgrade python38-libsUpgrade python38-psycopg2Upgrade python-cffi-debugsourceUpgrade python38-rpm-macrosUpgrade python38-pytzUpgrade python38-requestsUpgrade python38-pyparsingUpgrade python38-pyyamlUpgrade python38-tkinterUpgrade python38-debuginfoUpgrade python38-psycopg2-docUpgrade python38-setuptools-wheelUpgrade python38-Cython-debuginfoUpgrade python-psutil-debugsourceUpgrade python38-numpy-docUpgrade python38-CythonUpgrade python38-markupsafeUpgrade python38-scipyUpgrade python38-sixUpgrade python38-urllib3Upgrade python-lxml-debugsourceUpgrade python38-numpyUpgrade PyYAML-debugsourceUpgrade python38-psycopg2-testsUpgrade python38-cffiUpgrade python38-wcwidthUpgrade python38-pip-wheelUpgrade python38-testUpgrade python38-mod_wsgiUpgrade python38-more-itertoolsUpgrade python38-cryptographyUpgrade python38-cffi-debuginfoUpgrade python38-chardetUpgrade python38Upgrade python38-debugsourceUpgrade python-psycopg2-debugsourceUpgrade python38-idleUpgrade python38-setuptoolsUpgrade python38-babelUpgrade python38-lxml-debuginfoUpgrade python38-psycopg2-debuginfoUpgrade python38-pytestUpgrade Cython-debugsourceUpgrade python38-psutilUpgrade python38-pipUpgrade python38-scipy-debuginfoUpgrade python38-packagingUpgrade python38-pyUpgrade python38-pyyaml-debuginfoUpgrade python38-plyUpgrade python38-numpy-debuginfoUpgrade python38-jinja2Upgrade numpy-debugsourceUpgrade python38-attrsUpgrade scipy-debugsource | Jun 30, 2021 | Feb 9, 2021 |
| Rocky_linux | — | Upgrade python-lxml-debugsourceUpgrade python38-CythonUpgrade python-markupsafe-debugsourceUpgrade python38-debuginfoUpgrade python-cffi-debugsourceUpgrade python38-idleUpgrade python38-numpy-f2pyUpgrade python38Upgrade python38-cryptography-debuginfoUpgrade python38-markupsafe-debuginfoUpgrade PyYAML-debugsourceUpgrade python-cryptography-debugsourceUpgrade python38-markupsafeUpgrade python38-pyyaml-debuginfoUpgrade python38-scipyUpgrade python38-cryptographyUpgrade python38-lxmlUpgrade python38-pyyamlUpgrade python38-numpy-debuginfoUpgrade python38-lxml-debuginfoUpgrade python38-cffi-debuginfoUpgrade python38-psycopg2-docUpgrade scipy-debugsourceUpgrade python-psycopg2-debugsourceUpgrade python38-psycopg2Upgrade python38-tkinterUpgrade python38-debugUpgrade python38-testUpgrade python38-debugsourceUpgrade numpy-debugsourceUpgrade Cython-debugsourceUpgrade python38-libsUpgrade python38-psycopg2-debuginfoUpgrade python38-scipy-debuginfoUpgrade python-psutil-debugsourceUpgrade python38-psycopg2-testsUpgrade python38-psutil-debuginfoUpgrade python38-psutilUpgrade python38-numpyUpgrade python38-develUpgrade python38-mod_wsgiUpgrade python38-cffiUpgrade python38-Cython-debuginfo | May 5, 2022 | Feb 9, 2021 |
| Suse | — | Upgrade python3-pyyamlUpgrade python-pyyamlUpgrade python2-pyyaml | Mar 31, 2021 | Feb 9, 2021 |
| Ubuntu | — | Upgrade python3-yamlUpgrade python-yaml | May 11, 2021 | Feb 9, 2021 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Jan 20, 2025 | Feb 9, 2021 |
With curated Threat Intelligence, you can see which vulnerabilities truly put you at risk, prioritize what matters most, and act before attackers do.
Explore Intelligence Hub