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GHSA-4p4r-m79c-wq3v

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

Source: GitHub Advisory Database (reviewed) Moderate CVE-2026-34767

Packages

EcosystemPackageAffectedFixed in
npm electron < 38.8.6 38.8.6
npm electron >= 39.0.0-alpha.1, < 39.8.3 39.8.3
npm electron >= 40.0.0-alpha.1, < 40.8.3 40.8.3
npm electron >= 41.0.0-alpha.1, < 41.0.3 41.0.3

Details

As written in the advisory (Markdown source, shown as plain text).

### Impact 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. ### Workarounds Validate or sanitize any untrusted input before including it in a response header name or value. ### Fixed Versions * `41.0.3` * `40.8.3` * `39.8.3` * `38.8.6` ### For more information If there are any questions or comments about this advisory, send an email to [[email protected]](mailto:[email protected])

References

External links from the advisory. They lead to third-party sites.