CVE-2026-54257 | Electron is a framework for writing cross-platform desktop a… | CVSS 9.3 CRITICAL

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From 42.3.1 until 42.3.3, Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow. Most apps will crash and some may perform incorrect buffer allocations in the Node.js Buffer API resulting in unexpected truncation or allocation. This vulnerability is fixed in 42.3.3.

Metadata

CVE ID: CVE-2026-54257
State: PUBLISHED
Assigner: GitHub_M
Reserved: 2026-06-12 17:13 UTC
Published: 2026-06-23 17:08 UTC
Last updated: 2026-06-23 17:47 UTC
Primary CWE: CWE-120
CWE-120: Buffer Copy without Checking Size of Input ('Classi…
Vendor / Product: electron / electron
Sources: cve.org · NVD

Severity & Metrics

9.3 CRITICAL CVSS 4.0

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

SSVC — CISA Coordinator

Exploitation: none
Automatable: yes
Tech. Impact: partial

Affected products (1)

Vendor	Product	Platform	Versions
electron	electron	—	>= 42.3.1, < 42.3.3

Weakness (CWE)

CWE	Source	Description
CWE-120	cna	CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.3	CRITICAL	4.0	cna	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References (1)

https://github.com/electron/electron/security/advisories/GHSA-q6m5-f73j-m9mc https://github.com/electron/electron/security/advisories/GHSA-q6m5-f73j-m9mc