{"id":"ALPINE-CVE-2020-14343","details":"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.","modified":"2026-09-11T10:17:51.378703945Z","published":"2021-02-09T21:15:12.707Z","upstream":["CVE-2020-14343"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2020-14343"}],"affected":[{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.11","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r1"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.12","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r1"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.13","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r2"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.21","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.22","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.23","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.24","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.4-r0"}]}],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/alpine/ALPINE-CVE-2020-14343.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}