VulnerableCode Package Details - pkg:pypi/pyyaml@4.2b1

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Vulnerability	Summary	Fixed by
VCID-1d4s-2baq-wuhk Aliases: CVE-2017-18342 GHSA-rprw-h62v-c2w7 PYSEC-2018-49	In PyYAML before 5.1, the yaml.load() API could execute arbitrary code if used with untrusted data. The load() function has been deprecated in version 5.1 and the 'UnsafeLoader' has been introduced for backward compatibility with the function.	5.1 Affected by 4 other vulnerabilities. This version is affected by these other vulnerabilities: {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }} {{ fixed_by_vuln.vulnerability_id }}
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.

Vulnerability

Summary

Fixed by

VCID-1d4s-2baq-wuhk
Aliases:
CVE-2017-18342
GHSA-rprw-h62v-c2w7
PYSEC-2018-49

In PyYAML before 5.1, the yaml.load() API could execute arbitrary code if used with untrusted data. The load() function has been deprecated in version 5.1 and the 'UnsafeLoader' has been introduced for backward compatibility with the function.

5.1
Affected by 4 other vulnerabilities.

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.

Vulnerability	Summary	Aliases
VCID-1d4s-2baq-wuhk	In PyYAML before 5.1, the yaml.load() API could execute arbitrary code if used with untrusted data. The load() function has been deprecated in version 5.1 and the 'UnsafeLoader' has been introduced for backward compatibility with the function.	CVE-2017-18342 GHSA-rprw-h62v-c2w7 PYSEC-2018-49

Vulnerability

Summary

Aliases

VCID-1d4s-2baq-wuhk

CVE-2017-18342
GHSA-rprw-h62v-c2w7
PYSEC-2018-49

Date	Actor	Action	Vulnerability	Source	VulnerableCode Version
2026-04-16T21:19:28.946626+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
2026-04-16T20:51:00.713104+00:00	GitLab Importer	Fixing	VCID-1d4s-2baq-wuhk	https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/PyYAML/CVE-2017-18342.yml	38.4.0
2026-04-16T01:41:51.206759+00:00	GHSA Importer	Affected by	VCID-2wh2-rac2-53ax	https://github.com/advisories/GHSA-8q59-q68h-6hv4	38.4.0
2026-04-16T01:26:24.009005+00:00	GHSA Importer	Fixing	VCID-1d4s-2baq-wuhk	https://github.com/advisories/GHSA-rprw-h62v-c2w7	38.4.0
2026-04-11T22:31:47.866044+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
2026-04-11T22:01:43.362373+00:00	GitLab Importer	Fixing	VCID-1d4s-2baq-wuhk	https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/PyYAML/CVE-2017-18342.yml	38.3.0
2026-04-11T13:10:57.266423+00:00	GHSA Importer	Affected by	VCID-2wh2-rac2-53ax	https://github.com/advisories/GHSA-8q59-q68h-6hv4	38.3.0
2026-04-11T12:55:42.819110+00:00	GHSA Importer	Fixing	VCID-1d4s-2baq-wuhk	https://github.com/advisories/GHSA-rprw-h62v-c2w7	38.3.0
2026-04-02T22:43:07.741014+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
2026-04-02T22:14:44.281608+00:00	GitLab Importer	Fixing	VCID-1d4s-2baq-wuhk	https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/PyYAML/CVE-2017-18342.yml	38.1.0
2026-04-02T14:02:37.376522+00:00	GHSA Importer	Affected by	VCID-2wh2-rac2-53ax	https://github.com/advisories/GHSA-8q59-q68h-6hv4	38.1.0
2026-04-02T13:48:13.247210+00:00	GHSA Importer	Fixing	VCID-1d4s-2baq-wuhk	https://github.com/advisories/GHSA-rprw-h62v-c2w7	38.1.0
2026-04-01T17:00:50.947416+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
2026-04-01T16:32:16.053186+00:00	GitLab Importer	Fixing	VCID-1d4s-2baq-wuhk	https://gitlab.com/gitlab-org/advisories-community/-/blob/main/pypi/PyYAML/CVE-2017-18342.yml	38.0.0
2026-04-01T15:03:25.145804+00:00	PyPI Importer	Affected by	VCID-2wh2-rac2-53ax	https://osv-vulnerabilities.storage.googleapis.com/PyPI/all.zip	38.0.0
2026-04-01T15:00:18.857224+00:00	PyPI Importer	Affected by	VCID-1d4s-2baq-wuhk	https://osv-vulnerabilities.storage.googleapis.com/PyPI/all.zip	38.0.0
2026-04-01T12:43:18.050165+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
2026-04-01T12:41:45.358233+00:00	Pypa Importer	Affected by	VCID-1d4s-2baq-wuhk	https://github.com/pypa/advisory-database/blob/main/vulns/pyyaml/PYSEC-2018-49.yaml	38.0.0