What’s Vulnerable › Vulnerabilities

CVE-2020-28460: Prototype Pollution

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.5% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-22 · updated 2026-06-17
• Weakness: CWE-1321

Description

This affects the package multi-ini before 2.1.2. It is possible to pollute an object's prototype by specifying the constructor.proto object as part of an array. This is a bypass of CVE-2020-28448.

Affected products

• multi-ini: before 2.1.2 — fixed in 2.1.2

How to fix

Upgrade to a fixed version: multi-ini 2.1.2. Check the vendor advisory for mitigations.

References

• https://github.com/evangelion1204/multi-ini/commit/6b2212b2ce152c19538a2431415f72942c5a1bde
• https://snyk.io/vuln/SNYK-JS-MULTIINI-1053229
• https://github.com/evangelion1204/multi-ini/commit/6b2212b2ce152c19538a2431415f72942c5a1bde
• https://snyk.io/vuln/SNYK-JS-MULTIINI-1053229

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