This affects the package y18n before 3.2.2, 4.0.1 and 5.0.5. PoC by po6ix: const y18n = require('y18n')(); y18n.setLocale('__proto__'); y18n.updateLocale({polluted: true}); console.log(polluted); // true
:heavy_check_mark: This issue was automatically closed by Mend because the vulnerable library in the specific branch(es) was either marked as ignored or it is no longer part of the Mend inventory.
CVE-2020-7774 - High Severity Vulnerability
Vulnerable Library - y18n-4.0.0.tgz
the bare-bones internationalization library used by yargs
Library home page: https://registry.npmjs.org/y18n/-/y18n-4.0.0.tgz
Dependency Hierarchy: - compiler-cli-9.0.0-next.11.tgz (Root Library) - yargs-13.1.0.tgz - :x: **y18n-4.0.0.tgz** (Vulnerable Library)
Found in HEAD commit: 42aa6c8aeb73c8b3e41855c095451ae90ab18e28
Vulnerability Details
This affects the package y18n before 3.2.2, 4.0.1 and 5.0.5. PoC by po6ix: const y18n = require('y18n')(); y18n.setLocale('__proto__'); y18n.updateLocale({polluted: true}); console.log(polluted); // true
Publish Date: 2020-11-17
URL: CVE-2020-7774
CVSS 3 Score Details (7.3)
Base Score Metrics: - Exploitability Metrics: - Attack Vector: Network - Attack Complexity: Low - Privileges Required: None - User Interaction: None - Scope: Unchanged - Impact Metrics: - Confidentiality Impact: Low - Integrity Impact: Low - Availability Impact: Low
For more information on CVSS3 Scores, click here.Suggested Fix
Type: Upgrade version
Origin: https://www.npmjs.com/advisories/1654
Release Date: 2020-11-17
Fix Resolution: 3.2.2, 4.0.1, 5.0.5