No exploitation reportedFix available

CVE-2018-12115

Q: Is CVE-2018-12115 actively exploited?

Active exploitation of CVE-2018-12115 has not been confirmed. Its EPSS score was 8.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2018-12115?

CVE-2018-12115 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2018-08-21
Fixed in10.9.0 · 8.11.4 · 6.14.4
WeaknessCWE-787

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

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.

Timeline

dates in UTC

2018-08-2112:29CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2018-12115?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2018-12115?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Node.js

Branch	Affected	Fixed in	Source
10.x	≥ 10.0.0, < 10.9.0	10.9.0	NVD
8.x	≥ 8.0.0, < 8.11.4	8.11.4	NVD
6.14	< 6.14.4	6.14.4	NVD

Redhat openshift container platform

Branch	Affected	Fixed in	Source
3.11	= 3.11	no fix published	NVD

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Node.js to 10.9.0 · 8.11.4 · 6.14.4

Advisories and patches

nodejs.orgVendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

CISA-ADPSSVC decisionnone2026-10-15
OpenCVESSVC decisionnone—
NVDCVSS 3.07.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
CNAweakness (CWE)CWE-787read 2026-10-23
NVDweakness (CWE)CWE-787read 2026-10-23
FIRST EPSSEPSS score8.1 %2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2018-08-21
Last Modified: 2026-10-15
NVD status: Modified

Frequently asked questions

What is CVE-2018-12115?

Is CVE-2018-12115 actively exploited?

Active exploitation of CVE-2018-12115 has not been confirmed. Its EPSS score was 8.1% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2018-12115?

CVE-2018-12115 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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