CVE-2026-34767 (GCVE-0-2026-34767)

Vulnerability from cvelistv5 – Published: 2026-04-03 23:43 – Updated: 2026-04-06 19:07
VLAI
Title
Electron: HTTP Response Header Injection in custom protocol handlers and webRequest
Summary
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.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-06 19:07 UTC
CWE
  • CWE-74 - Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
  • CWE-113 - Improper Neutralization of CRLF Sequences in HTTP Headers ('HTTP Request/Response Splitting')
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
electron electron Affected: < 38.8.6
Affected: >= 39.0.0-alpha.1, < 39.8.3
Affected: >= 40.0.0-alpha.1, < 40.8.3
Affected: >= 41.0.0-alpha.1, < 41.0.3
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