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Vulnerability record · CVE-2018-12115 · published 21 August 2018

CVE-2018-12115: Nodejs node.js out-of-bounds write vulnerability

Nodejs · Node.Js

In all versions of Node.js prior to 6.14.4, 8.11.4 and 10.9.0 when used with UCS-2 encoding (recognized by Node.js under the names `'ucs2'`, `'ucs-2'`, `'utf16le'` and `'utf-16le'`), `Buffer#write()` can be abused to write outside of the bounds of a single `Buffer`. Writes that start from the second-to-last position of a buffer cause a miscalculation of the maximum length of the input bytes to be written.

7.5 CVSS 3.0 High EPSS 8.0% · top 5.4% CWE-787 · Out-of-bounds write
7.5CVSS 3.0 base score, v2 5.0
8.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
2Affected product versions listed by NVD
16References
17 Jun 2026Last modified by NVD

Description

In all versions of Node.js prior to 6.14.4, 8.11.4 and 10.9.0 when used with UCS-2 encoding (recognized by Node.js under the names `'ucs2'`, `'ucs-2'`, `'utf16le'` and `'utf-16le'`), `Buffer#write()` can be abused to write outside of the bounds of a single `Buffer`. Writes that start from the second-to-last position of a buffer cause a miscalculation of the maximum length of the input bytes to be written.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

2 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.securityfocus.com/bid/105127 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:2552 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2553 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2944 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2949 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3537 Third Party Advisory
https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/ Vendor Advisory
https://security.gentoo.org/glsa/202003-48
http://www.securityfocus.com/bid/105127 Third Party AdvisoryVDB Entry
https://access.redhat.com/errata/RHSA-2018:2552 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2553 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2944 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:2949 Third Party Advisory
https://access.redhat.com/errata/RHSA-2018:3537 Third Party Advisory
https://nodejs.org/en/blog/vulnerability/august-2018-security-releases/ Vendor Advisory
https://security.gentoo.org/glsa/202003-48

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Source: NIST National Vulnerability Database (record CVE-2018-12115), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.