Summary
Prototype Pollution
All versions of utils-extend are vulnerable to prototype pollution. The extend function does not restrict the modification of an Object's prototype, which may allow an attacker to add or modify an existing property that will exist on all objects.
Impact
Affected versions
Security releases
Kodem intelligence
Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter. Kodem's runtime-powered SCA identifies whether this CVE is reachable in your applications.
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No fix is currently available. Consider using an alternative package until a fix is made available.
Frequently Asked Questions
- What is CVE-2020-8147? CVE-2020-8147 is a high-severity security vulnerability in utils-extend (npm), affecting versions >= 0.0.0. No fixed version is listed yet.
- Which versions of utils-extend are affected by CVE-2020-8147? utils-extend (npm) versions >= 0.0.0 is affected.
- Is there a fix for CVE-2020-8147? No fixed version is listed for CVE-2020-8147 yet. Monitor the advisory for updates and apply mitigations in the interim.
- Is CVE-2020-8147 exploitable, and should I be worried? Whether CVE-2020-8147 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
- What actually determines whether CVE-2020-8147 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.