CVE WatchOct 15, 2026

CVE-2018-12115

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'`,

CVSS

7.5

High

EPSS

7.8%

p95

KEV

—

Exploit Today

0-100

Published: Aug 21, 2018 · Last modified: Oct 15, 2026 · CWE-787

EPSS · 30d

7.8%EPSS · 30 days8.1%

2026-10-022026-10-29

Technical 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.

Official references

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