CVE-2026-115895: happy-dom >= 17.0.0, < 21.0.4

CVE-2026-115895 affects happy-dom. CVSS 3.1 base score 8.8 (HIGH, Vendor/CNA). Affected range: >= 17.0.0, <= 21.0.3. Fixed version: 21.0.4.

Affected technology

happy-dom · >= 17.0.0, < 21.0.4
capricorn86

Component: Not specified by the source
Function: syntactically

Attack conditions (Vendor/CNA, CVSS 3.1): Network (remote) · No privileges required · User interaction required

What an attacker can do

Vendor/CNA’s CVSS 3.1 assessment (base score 8.8/10) rates confidentiality, integrity and availability impact as high. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 24-Oct-2026 01:43 UTC

CWE: CWE-94
Product: happy-dom
CCR priority: 35.2 /100 (P4)
CVSS 3.1: 8.8 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H · Vendor/CNA
KEV: no

Provenance

GitHub Advisory Database · Source record · observed 2026-10-24 01:45:06.114611+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-24 01:40:49.068977+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-115895.html