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Package details: pkg:pypi/pyyaml@5.3.1
purl pkg:pypi/pyyaml@5.3.1
Next non-vulnerable version 5.4
Latest non-vulnerable version 5.4
Risk 4.5
Vulnerabilities affecting this package (1)
Vulnerability Summary Fixed by
VCID-2wh2-rac2-53ax
Aliases:
CVE-2020-14343
GHSA-8q59-q68h-6hv4
PYSEC-2021-142
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.
5.4
Affected by 0 other vulnerabilities.
Vulnerabilities fixed by this package (1)
Vulnerability Summary Aliases
VCID-hrtt-vfbb-87bf 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. CVE-2020-1747
GHSA-6757-jp84-gxfx
PYSEC-2020-96

Date Actor Action Vulnerability Source VulnerableCode Version
2026-04-16T21:19:28.992615+00:00 GitLab Importer Affected by VCID-2wh2-rac2-53ax https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/PyYAML/CVE-2020-14343.yml 38.4.0
2026-04-16T01:43:18.858247+00:00 GHSA Importer Fixing VCID-hrtt-vfbb-87bf https://github.com/advisories/GHSA-6757-jp84-gxfx 38.4.0
2026-04-16T01:41:51.263077+00:00 GHSA Importer Affected by VCID-2wh2-rac2-53ax https://github.com/advisories/GHSA-8q59-q68h-6hv4 38.4.0
2026-04-11T22:31:47.916696+00:00 GitLab Importer Affected by VCID-2wh2-rac2-53ax https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/PyYAML/CVE-2020-14343.yml 38.3.0
2026-04-11T13:12:31.063528+00:00 GHSA Importer Fixing VCID-hrtt-vfbb-87bf https://github.com/advisories/GHSA-6757-jp84-gxfx 38.3.0
2026-04-11T13:10:57.323683+00:00 GHSA Importer Affected by VCID-2wh2-rac2-53ax https://github.com/advisories/GHSA-8q59-q68h-6hv4 38.3.0
2026-04-02T22:43:07.787356+00:00 GitLab Importer Affected by VCID-2wh2-rac2-53ax https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/PyYAML/CVE-2020-14343.yml 38.1.0
2026-04-02T14:03:58.987963+00:00 GHSA Importer Fixing VCID-hrtt-vfbb-87bf https://github.com/advisories/GHSA-6757-jp84-gxfx 38.1.0
2026-04-02T14:02:37.424278+00:00 GHSA Importer Affected by VCID-2wh2-rac2-53ax https://github.com/advisories/GHSA-8q59-q68h-6hv4 38.1.0
2026-04-02T12:36:34.046892+00:00 GitLab Importer Fixing VCID-hrtt-vfbb-87bf https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/PyYAML/CVE-2020-1747.yml 38.0.0
2026-04-01T17:00:50.993117+00:00 GitLab Importer Affected by VCID-2wh2-rac2-53ax https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/PyYAML/CVE-2020-14343.yml 38.0.0
2026-04-01T15:03:25.199832+00:00 PyPI Importer Affected by VCID-2wh2-rac2-53ax https://osv-vulnerabilities.storage.googleapis.com/PyPI/all.zip 38.0.0
2026-04-01T13:00:53.673327+00:00 GithubOSV Importer Fixing VCID-hrtt-vfbb-87bf https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2021/04/GHSA-6757-jp84-gxfx/GHSA-6757-jp84-gxfx.json 38.0.0
2026-04-01T12:43:18.075523+00:00 Pypa Importer Affected by VCID-2wh2-rac2-53ax https://github.com/pypa/advisory-database/blob/main/vulns/pyyaml/PYSEC-2021-142.yaml 38.0.0
2026-04-01T12:42:24.136215+00:00 Pypa Importer Fixing VCID-hrtt-vfbb-87bf https://github.com/pypa/advisory-database/blob/main/vulns/pyyaml/PYSEC-2020-96.yaml 38.0.0