EXECUTIVE SUMMARY:
CVE-2026-54257 with a CVSS score of 9.3 is a critical vulnerability in the Electron framework, specifically affecting versions 42.3.1 and above, up to but not including version 42.3.3, where the Buffer API performs incorrect byte length calculations, resulting in heap buffer under/overflow due to incorrect buffer allocations in the Node.js Buffer API. An attacker can exploit this vulnerability by crafting malicious input that triggers the incorrect buffer allocation, with the attack vector being through the affected Electron application, and requiring access to the application's environment. If successfully exploited, the attacker gains the capability to cause the application to crash or perform unexpected behavior, potentially leading to unauthorized access or data corruption. The business impact and consequences of this vulnerability being exploited include disruption of critical services, data loss, and potential security breaches, which can have significant financial and reputational consequences. Exploitation of this vulnerability requires the presence of an affected Electron version and the ability to craft and deliver malicious input to the application, with most apps being susceptible to crashes and some potentially performing incorrect buffer allocations.[/subscribe_to_unlock_form]
EXECUTIVE SUMMARY:
CVE-2026-54257 with a CVSS score of 9.3 is a critical vulnerability in the Electron framework, specifically affecting versions 42.3.1 and above, up to but not including version 42.3.3, where the Buffer API performs incorrect byte length calculations, resulting in heap buffer under/overflow due to incorrect buffer allocations in the Node.js Buffer API. An attacker can exploit this vulnerability by crafting malicious input that triggers the incorrect buffer allocation, with the attack vector being through the affected Electron application, and requiring access to the application's environment. If successfully exploited, the attacker gains the capability to cause the application to crash or perform unexpected behavior, potentially leading to unauthorized access or data corruption. The business impact and consequences of this vulnerability being exploited include disruption of critical services, data loss, and potential security breaches, which can have significant financial and reputational consequences. Exploitation of this vulnerability requires the presence of an affected Electron version and the ability to craft and deliver malicious input to the application, with most apps being susceptible to crashes and some potentially performing incorrect buffer allocations.[emaillocker id="1283"]
RECOMMENDATION:
We recommend you to update Electron to version 42.3.3.
REFERENCES:
The following reports contain further technical details:
https://github.com/advisories/GHSA-q6m5-f73j-m9mc