CVE-2019-20477

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

5.16% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 91.7% of scored records. A rank, not a probability.

NVD base score

9.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2020-02-19 03:09Z6 YR AGO

Last updated

2024-08-05 02:39Z2 YR AGO

Reserved

2020-02-19

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-502Deserialization of Untrusted DataBase

Data version

5.1

Document digest

bc7ded9e63c176136b5d42ce685e5a9c3625019eb5e80c094dcf1c53c38de986

• github.comhttps://github.com/yaml/pyyaml/blob/master/CHANGESx_refsource_MISC
• www.exploit-db.comhttps://www.exploit-db.com/download/47655x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2020-3162499159https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/52N5XS73Z5S4ZN7I7R56ICCPCTKCUV4H/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-e84e90dc4ahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/33VBUY73AA6CTTYL3LRWHNFDULV7PFPN/vendor-advisoryx_refsource_FEDORA