What is CVE-2016-10583?

CVE-2016-10583 is a high-severity security vulnerability in closure-util (npm), affecting versions <= 2.0.0-beta.1. No fixed version is listed yet.

How severe is CVE-2016-10583?

CVE-2016-10583 has a CVSS score of 8.1 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Which versions of closure-util are affected by CVE-2016-10583?

closure-util (npm) versions <= 2.0.0-beta.1 is affected.

Is there a fix for CVE-2016-10583?

No fixed version is listed for CVE-2016-10583 yet. Monitor the advisory for updates and apply mitigations in the interim.

Is CVE-2016-10583 exploitable, and should I be worried?

Whether CVE-2016-10583 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.

What actually determines whether CVE-2016-10583 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.

CVE-2016-10583 in closure-util

Q: How severe is CVE-2016-10583?

CVE-2016-10583 has a CVSS score of 8.1 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.

Q: Which versions of closure-util are affected by CVE-2016-10583?

closure-util (npm) versions <= 2.0.0-beta.1 is affected.

Q: Is there a fix for CVE-2016-10583?

No fixed version is listed for CVE-2016-10583 yet. Monitor the advisory for updates and apply mitigations in the interim.

Q: Is CVE-2016-10583 exploitable, and should I be worried?

Whether CVE-2016-10583 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.

Q: What actually determines whether CVE-2016-10583 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.

Summary

closure-util downloads Resources over HTTP

Affected versions of closure-util insecurely download an executable over an unencrypted HTTP connection.

In scenarios where an attacker has a privileged network position, it is possible to intercept the response and replace the executable with a malicious one, resulting in code execution on the system running closure-util.

Impact

CVE-2016-10583 has a CVSS score of 8.1 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. No fixed version is listed yet, so configuration controls and monitoring matter more in the interim.

Affected versions

closure-util (<= 2.0.0-beta.1)

Security releases

Not available

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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Remediation advice

To mitigate this issue:

Install the package using npm's --ignore-scripts flag.
Navigate to the package directory, and open default-config.json in a text editor
Change the download URLs in the compiler_url and library_url to https equivalents
run npm i in the package directory.

Frequently Asked Questions

What is CVE-2016-10583? CVE-2016-10583 is a high-severity security vulnerability in closure-util (npm), affecting versions <= 2.0.0-beta.1. No fixed version is listed yet.
How severe is CVE-2016-10583? CVE-2016-10583 has a CVSS score of 8.1 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
Which versions of closure-util are affected by CVE-2016-10583? closure-util (npm) versions <= 2.0.0-beta.1 is affected.
Is there a fix for CVE-2016-10583? No fixed version is listed for CVE-2016-10583 yet. Monitor the advisory for updates and apply mitigations in the interim.
Is CVE-2016-10583 exploitable, and should I be worried? Whether CVE-2016-10583 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-2016-10583 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.