What is CVE-2023-26139?

CVE-2023-26139 is a high-severity security vulnerability in underscore-keypath (npm), affecting versions >= 0.0.11, <= 0.9.3. No fixed version is listed yet.

How severe is CVE-2023-26139?

CVE-2023-26139 has a CVSS score of 7.5 (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 underscore-keypath are affected by CVE-2023-26139?

underscore-keypath (npm) versions >= 0.0.11, <= 0.9.3 is affected.

Is there a fix for CVE-2023-26139?

No fixed version is listed for CVE-2023-26139 yet. Monitor the advisory for updates and apply mitigations in the interim.

Is CVE-2023-26139 exploitable, and should I be worried?

Whether CVE-2023-26139 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-2023-26139 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-2023-26139 in underscore-keypath

Q: How severe is CVE-2023-26139?

CVE-2023-26139 has a CVSS score of 7.5 (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 underscore-keypath are affected by CVE-2023-26139?

underscore-keypath (npm) versions >= 0.0.11, <= 0.9.3 is affected.

Q: Is there a fix for CVE-2023-26139?

No fixed version is listed for CVE-2023-26139 yet. Monitor the advisory for updates and apply mitigations in the interim.

Q: Is CVE-2023-26139 exploitable, and should I be worried?

Whether CVE-2023-26139 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-2023-26139 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

underscore-keypath vulnerable to Prototype Pollution

Versions of the package underscore-keypath from 0.0.11 are vulnerable to Prototype Pollution via the name argument of the setProperty() function. Exploiting this vulnerability is possible due to improper input sanitization which allows the usage of arguments like __proto__.

Impact

CVE-2023-26139 has a CVSS score of 7.5 (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

underscore-keypath (>= 0.0.11, <= 0.9.3)

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

No fixed version is listed for CVE-2023-26139 yet.

Kodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.

Frequently Asked Questions

What is CVE-2023-26139? CVE-2023-26139 is a high-severity security vulnerability in underscore-keypath (npm), affecting versions >= 0.0.11, <= 0.9.3. No fixed version is listed yet.
How severe is CVE-2023-26139? CVE-2023-26139 has a CVSS score of 7.5 (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 underscore-keypath are affected by CVE-2023-26139? underscore-keypath (npm) versions >= 0.0.11, <= 0.9.3 is affected.
Is there a fix for CVE-2023-26139? No fixed version is listed for CVE-2023-26139 yet. Monitor the advisory for updates and apply mitigations in the interim.
Is CVE-2023-26139 exploitable, and should I be worried? Whether CVE-2023-26139 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-2023-26139 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.