SCA: security update for pyyaml (GHSA-3pqx-4fqf-j49f)

critical Tenable Self-Hosted Container Security Plugin ID 409637

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

- 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. (CVE-2019-20477)

Plugin Details

Severity: Critical

ID: 409637

Version: Revision 1.5

Type: Local

Family: SCA Checks

Published: 1/23/2025

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 57.15

Vendor

Vendor Severity: Critical

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

CVSS Score Source: CVE-2019-20477

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

CVSS v4

Risk Factor: Critical

Base Score: 9.3

Threat Score: 8.9

Threat Vector: CVSS:4.0/E:P

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/20/2021

Vulnerability Publication Date: 2/19/2020

Reference Information

CVE: CVE-2019-20477

cwe: CWE-502

Detections

Analytics