What’s Vulnerable › Vulnerabilities

CVE-2020-7742: Prototype Pollution

• Severity: medium (CVSS 5.0 v2.0)
• 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: 2020-10-07 · updated 2026-06-17

Description

This affects the package simpl-schema before 1.10.2.

Affected products

• simpl-schema: before 1.10.2 — fixed in 1.10.2

How to fix

Upgrade to a fixed version: simpl-schema 1.10.2. Check the vendor advisory for mitigations.

References

• https://github.com/aldeed/simpl-schema/blob/main/package/lib/utility/merge.js
• https://snyk.io/vuln/SNYK-JS-SIMPLSCHEMA-1016157
• https://github.com/aldeed/simpl-schema/blob/main/package/lib/utility/merge.js
• https://snyk.io/vuln/SNYK-JS-SIMPLSCHEMA-1016157

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