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Vulnerability record · CVE-2019-20478 · published 19 February 2020

CVE-2019-20478: Ruamel.yaml project ruamel.yaml vulnerability

RRuamel.Yaml Project · Ruamel.Yaml

In ruamel.yaml through 0.16.7, the load method allows remote code execution if the application calls this method with an untrusted argument. In other words, this issue affects developers who are unaware of the need to use methods such as safe_load in these use cases.

9.8 CVSS 3.1 Critical EPSS 6.8% · top 6.3%
9.8CVSS 3.1 base score, v2 10.0
6.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

Description

In ruamel.yaml through 0.16.7, the load method allows remote code execution if the application calls this method with an untrusted argument. In other words, this issue affects developers who are unaware of the need to use methods such as safe_load in these use cases.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.exploit-db.com/exploits/47655 Third Party AdvisoryVDB Entry
https://www.exploit-db.com/exploits/47655 Third Party AdvisoryVDB Entry

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Source: NIST National Vulnerability Database (record CVE-2019-20478), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.