Bug 2455000 (CVE-2026-34767)

Summary: CVE-2026-34767 electron: Electron: HTTP Response Header Injection via attacker-controlled input
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedKeywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in Electron, a framework used for developing cross-platform desktop applications. This vulnerability, known as HTTP response header injection, occurs when an application reflects attacker-controlled input into a response header. A remote attacker could exploit this to inject additional response headers, potentially compromising security controls like cookies, content security policy, or cross-origin access controls. This could lead to unauthorized data access or manipulation within affected applications. Apps that do not reflect external input into response headers are not affected.
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Bug Depends On: 2455454, 2455455    
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Description OSIDB Bzimport 2026-04-04 00:01:34 UTC 
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.