VULNERABILITY INTELLIGENCE
CVE-2019-20477
CVSS score9.8 CRITICAL
EPSS probability5.11%
CISA KEVNot currently listed
Published2020-02-19
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description
PyYAML 5.1 through 5.1.2 has insufficient restrictions on the load and load_all functions because of a class deserialization issue, e.g., Popen is a class in the subprocess module. NOTE: this issue exists because of an incomplete fix for CVE-2017-18342.
Weakness classification
- nvd@nist.gov: CWE-502
Primary references
- cve@mitre.org — Release Notes, Third Party Advisory
- cve@mitre.org
- cve@mitre.org
- cve@mitre.org — Exploit, Third Party Advisory, VDB Entry
- af854a3a-2127-422b-91ae-364da2661108 — Release Notes, Third Party Advisory
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108
- af854a3a-2127-422b-91ae-364da2661108 — Exploit, Third Party Advisory, VDB Entry