CVE-2020-1747
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.
CVSS score
9.8
EPSS probability
%5.4
Risk score
0.5
Published
6 y ago
Vulnerability Timeline (Change History)
CVE-2020-1747 historical changes made to the vulnerability by NVD, CISA and MITRE:
| Date | Actor / Source | Action / Description | Type | Previous value | New value |
|---|---|---|---|---|---|
| 24.10.2026 | nvd@nist.gov | Initial Analysis & CVSS Vector Assignment | CVSS V3.1 | — | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| 10.03.2020 | CISA Coordinator | SSVC Risk Re-assessment | SSVC / KEV | exploitation: none | exploitation: none |
| 10.03.2020 | MITRE / NVD | New CVE Record Received & Ingested | CVE Created | — | CVE-2020-1747 |
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