{"id":"ALPINE-CVE-2020-1747","details":"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.","modified":"2026-03-09T01:18:27.452475Z","published":"2020-03-24T15:15:12.293Z","upstream":["CVE-2020-1747"],"references":[{"type":"ADVISORY","url":"https://security.alpinelinux.org/vuln/CVE-2020-1747"}],"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-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-1747.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-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0","5.3-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-1747.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-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0","5.3-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-1747.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.14","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0","5.3-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-1747.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.15","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0","5.3-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-1747.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.16","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0","5.3-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-1747.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.17","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0","5.3-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-1747.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.18","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0","5.3-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-1747.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.19","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0","5.3-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-1747.json"}},{"package":{"name":"py3-yaml","ecosystem":"Alpine:v3.20","purl":"pkg:apk/alpine/py3-yaml?arch=source"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"5.3.1-r0"}]}],"versions":["3.10-r0","3.10-r1","3.11-r0","3.12-r0","3.12-r1","4.1-r0","5.1-r0","5.1.1-r0","5.1.2-r0","5.1.2-r1","5.1.2-r2","5.2-r0","5.3-r0"],"ecosystem_specific":{},"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/alpine/ALPINE-CVE-2020-17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