What’s Vulnerable › Vulnerabilities

CVE-2018-21270

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2020-12-03 · updated 2026-06-17
• Weakness: CWE-125

Description

Versions less than 0.0.6 of the Node.js stringstream module are vulnerable to an out-of-bounds read because of allocation of uninitialized buffers when a number is passed in the input stream (when using Node.js 4.x).

Affected products

• Node.js: before 0.0.6 — fixed in 0.0.6

How to fix

Upgrade to a fixed version: Node.js 0.0.6. Check the vendor advisory for mitigations.

References

• https://github.com/mhart/StringStream/issues/7
• https://hackerone.com/reports/321670
• https://www.npmjs.com/advisories/664
• https://github.com/mhart/StringStream/issues/7
• https://hackerone.com/reports/321670
• https://www.npmjs.com/advisories/664

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