CVE-2026-34768 in Electron
Summary
by MITRE • 04/04/2026
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8, on Windows, app.setLoginItemSettings({openAtLogin: true}) wrote the executable path to the Run registry key without quoting. If the app is installed to a path containing spaces, an attacker with write access to an ancestor directory may be able to cause a different executable to run at login instead of the intended app. On a default Windows install, standard system directories are protected against writes by standard users, so exploitation typically requires a non-standard install location. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8.
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Analysis
by VulDB Data Team • 04/04/2026
The vulnerability described in CVE-2026-34768 represents a critical registry manipulation flaw within the Electron framework that affects Windows desktop applications. This issue specifically impacts applications that utilize the app.setLoginItemSettings() API with the openAtLogin parameter set to true, which is commonly used to automatically launch applications at system startup. The vulnerability stems from the improper handling of executable paths when writing to the Windows Run registry key, where the framework fails to properly quote the executable path string. This omission creates a significant security risk that can be exploited by malicious actors to execute unauthorized code during system boot processes. The flaw is particularly concerning because it directly impacts the integrity of the system's startup mechanism, potentially allowing attackers to hijack legitimate application execution paths.
The technical implementation of this vulnerability involves the Electron framework's registry manipulation code that writes application paths to the Windows registry without proper shell escaping or path quoting. When an application is installed to a directory path containing spaces, the absence of quotation marks around the executable path creates an opportunity for path traversal attacks. An attacker with write permissions to an ancestor directory of the application installation can manipulate the registry entry to point to a malicious executable instead of the intended application. This occurs because Windows command processing interprets spaces as argument separators, allowing an attacker to inject additional commands or redirect execution to a different binary. The vulnerability is classified under CWE-78 as improper neutralization of special elements used in OS commands, and it aligns with ATT&CK technique T1547.001 for Registry Run Keys / Startup Folder, which focuses on persistence mechanisms through Windows registry modifications.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass broader system compromise capabilities. Attackers can leverage this flaw to establish persistent backdoors, execute malicious payloads with elevated privileges, or perform credential theft operations during system startup when the target application would normally run with user permissions. The attack vector requires an attacker to possess write access to a parent directory of the application installation, which typically necessitates either administrative privileges or a non-standard installation that places the application in a writable location. However, the vulnerability is particularly dangerous because it can be exploited through various attack paths including social engineering, privilege escalation, or by exploiting other vulnerabilities that provide write access to system directories. The patching requirements for this vulnerability necessitate upgrading to Electron versions 38.8.6, 39.8.1, 40.8.0, or 41.0.0-beta.8, which implement proper path quoting mechanisms in the registry manipulation code.
Organizations deploying Electron-based applications should implement immediate mitigations including verifying application installation paths do not contain spaces or special characters that could be exploited, conducting security audits of existing registry entries, and ensuring all applications are updated to patched versions. The vulnerability highlights the importance of proper input sanitization and shell escaping in cross-platform application frameworks, particularly when dealing with system-level operations that modify registry settings or execute system commands. Security teams should also monitor for potential exploitation attempts by watching for unusual registry modifications in the Run key locations and implement proper access controls for application installation directories. The incident underscores the critical need for application frameworks to properly handle special characters and path separators in system-level operations, as demonstrated by the ATT&CK framework's emphasis on preventing unauthorized modifications to system startup mechanisms. This vulnerability serves as a reminder of the importance of robust input validation and proper security practices in application development, particularly for frameworks that interact directly with operating system APIs and registry settings.