{"action":"Upgrade pyyaml to 5.3.1 or later.","affected":[{"fixed":"5.3.1","introduced":"5.1b7"}],"component":"pyyaml","cve_ids":["CVE-2020-1747"],"ecosystem":"PyPI","epss":0.05442,"exploited":false,"fixed_versions":["5.3.1"],"ghsa_id":"GHSA-6757-jp84-gxfx","id":"tcs_01M5KF2R0MT3CAZSJCD3YF9RFJ","modified_at":"2026-05-04T08:57:14.897560893Z","published_at":"2021-04-20T16:14:24Z","references":["https://osv.dev/vulnerability/GHSA-6757-jp84-gxfx","https://nvd.nist.gov/vuln/detail/CVE-2020-1747","https://github.com/github/advisory-database/pull/4942","https://github.com/yaml/pyyaml/pull/386","https://github.com/yaml/pyyaml/commit/0cedb2a0697b2bc49e4f3841b8d4590b6b15657e","https://github.com/yaml/pyyaml/commit/5080ba513377b6355a0502104846ee804656f1e0","https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-1747","https://github.com/advisories/GHSA-6757-jp84-gxfx","https://github.com/pypa/advisory-database/tree/main/vulns/pyyaml/PYSEC-2020-96.yaml","https://github.com/yaml/pyyaml","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/7PPAS6C4SZRDQLR7C22A5U3QOLXY33JX","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/K5HEPD7LEVDPCITY5IMDYWXUMX37VFMY","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MMQXSZXNJT6ERABJZAAICI3DQSQLCP3D","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/WORRFHPQVAFKKXXWLSSW6XKUYLWM6CSH","https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/ZBJA3SGNJKCAYPSHOHWY3KBCWNM5NYK2","https://www.oracle.com/security-alerts/cpujul2022.html","http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00017.html","http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00017.html"],"severity":{"label":"critical","score":9.8},"sources":[{"source":"osv","source_id":"GHSA-6757-jp84-gxfx","url":"https://osv.dev/vulnerability/GHSA-6757-jp84-gxfx"}],"summary":"Improper Input Validation in PyYAML"}