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CVE-2026-34767GHSA-4P4R-M79C-WQ3V

Electron: HTTP Response Header Injection in custom protocol handlers and webRequest

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 38.8.6, 39.8.3, 40.8.3, 41.0.3
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • electron electron

    fixed in 38.8.6; From 39.0.0-alpha.1 · fixed in 39.8.3; From 40.0.0-alpha.1 · fixed in 40.8.3; From 41.0.0-alpha.1 · fixed in 41.0.3

  • electronnpm

    fixed in 38.8.6

  • electronnpm

    From 39.0.0-alpha.1 · fixed in 39.8.3

  • electronnpm

    From 40.0.0-alpha.1 · fixed in 40.8.3

  • electronnpm

    From 41.0.0-alpha.1 · fixed in 41.0.3

References 1

GitHub · electron/electron