CVE-2026-34767
MediumCVSS 5.9Exploitation Probability (EPSS)
Low risk12th percentile - higher than 12% of all known CVEs
Summary
Electron, a framework for building desktop applications, has an HTTP response header injection vulnerability. Apps that register custom protocol handlers via protocol.handle() or modify response headers via webRequest.onHeadersReceived may be vulnerable if attacker-controlled input is reflected into a response header name or value. This affects versions prior to 38.8.6, 39.8.3, 40.8.3, and 41.0.3.
Risk Assessment
An attacker can inject additional response headers, affecting cookies, content security policy, or cross-origin access controls, potentially leading to cross-site scripting or other attacks.
Recommendation
It is recommended to update Electron to versions 38.8.6, 39.8.3, 40.8.3, or 41.0.3 (or later), which include the fix.
Original NVD description (English source)
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.3, 40.8.3, and 41.0.3, apps that register custom protocol handlers via protocol.handle() / protocol.registerSchemesAsPrivileged() or modify response headers via webRequest.onHeadersReceived may be vulnerable to HTTP response header injection if attacker-controlled input is reflected into a response header name or value. An attacker who can influence a header value may be able to inject additional response headers, affecting cookies, content security policy, or cross-origin access controls. Apps that do not reflect external input into response headers are not affected. This issue has been patched in versions 38.8.6, 39.8.3, 40.8.3, and 41.0.3.