Which versions of stringstream are affected by CVE-2018-21270?

stringstream (npm) versions < 0.0.6 is affected.

Is there a fix for CVE-2018-21270?

Yes. CVE-2018-21270 is fixed in 0.0.6. Upgrade to this version or later.

Is CVE-2018-21270 exploitable, and should I be worried?

Whether CVE-2018-21270 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-2018-21270 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.

How do I fix CVE-2018-21270?

Upgrade stringstream to 0.0.6 or later.

CVE-2018-21270 in stringstream

Q: What is CVE-2018-21270?

CVE-2018-21270 is a medium-severity out-of-bounds read vulnerability in stringstream (npm), affecting versions < 0.0.6. It is fixed in 0.0.6. A read operation accesses a memory location beyond the intended buffer boundary.

Q: Is there a fix for CVE-2018-21270?

Yes. CVE-2018-21270 is fixed in 0.0.6. Upgrade to this version or later.

Q: Is CVE-2018-21270 exploitable, and should I be worried?

Whether CVE-2018-21270 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-2018-21270 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.

Q: How do I fix CVE-2018-21270?

Upgrade stringstream to 0.0.6 or later.

CVE-2018-21270

CVE-2018-21270 is a medium-severity out-of-bounds read vulnerability in stringstream (npm), affecting versions < 0.0.6. It is fixed in 0.0.6.

Does this CVE actually affect you?

Kodem shows which CVEs are reachable and running in your applications, so you fix what's exploitable, not just what's listed.

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Runtime intelligence, not another scanner.

Summary

Out-of-bounds Read in stringstream

All versions of stringstream are vulnerable to out-of-bounds read as it allocates uninitialized Buffers when number is passed in input stream on Node.js 4.x and below.

Impact

A read operation accesses a memory location beyond the intended buffer boundary. Typical impact: sensitive data disclosure or crash.

Affected versions

stringstream (< 0.0.6)

Security releases

stringstream → 0.0.6 (npm)

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 fix is currently available for this vulnerability. It is our recommendation to not install or use this module if user input is being passed in to stringstream.

Frequently Asked Questions

What is CVE-2018-21270? CVE-2018-21270 is a medium-severity out-of-bounds read vulnerability in stringstream (npm), affecting versions < 0.0.6. It is fixed in 0.0.6. A read operation accesses a memory location beyond the intended buffer boundary.
Which versions of stringstream are affected by CVE-2018-21270? stringstream (npm) versions < 0.0.6 is affected.
Is there a fix for CVE-2018-21270? Yes. CVE-2018-21270 is fixed in 0.0.6. Upgrade to this version or later.
Is CVE-2018-21270 exploitable, and should I be worried? Whether CVE-2018-21270 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-2018-21270 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.
How do I fix CVE-2018-21270? Upgrade stringstream to 0.0.6 or later.