CVE-2026-34767
CVE-2026-34767 · Electron: HTTP Response Header Injection in custom protocol handlers and webRequest
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 5.9 · Medium · EPSS 0.2% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
electron
- Versions
- < 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: Affected
No fix published
electron npm
- Affected ranges
- SEMVER: < 38.8.6
Update to 38.8.6
electron npm
- Affected ranges
- SEMVER: ≥ 39.0.0-alpha.1, < 39.8.3
Update to 39.8.3
electron npm
- Affected ranges
- SEMVER: ≥ 40.0.0-alpha.1, < 40.8.3
Update to 40.8.3
electron npm
- Affected ranges
- SEMVER: ≥ 41.0.0-alpha.1, < 41.0.3
Update to 41.0.3