HTTP Response Splitting Affecting electron package, versions <38.8.6>=39.0.0-alpha.1 <39.8.3>=40.0.0-alpha.2 <40.8.3>=41.0.0-alpha.1 <41.0.3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-ELECTRON-15875973
- published3 Apr 2026
- disclosed3 Apr 2026
- creditUnknown
Introduced: 3 Apr 2026
NewCVE-2026-34767 (opens in a new tab)How to fix?
Upgrade electron to version 38.8.6, 39.8.3, 40.8.3, 41.0.3 or higher.
Overview
electron is a framework which lets you write cross-platform desktop applications using JavaScript, HTML and CSS.
Affected versions of this package are vulnerable to HTTP Response Splitting via the protocol.handle, protocol.registerSchemesAsPrivileged, or webRequest.onHeadersReceived functions. An attacker can manipulate HTTP response headers by injecting attacker-controlled input into a response header name or value, potentially allowing the setting of arbitrary headers that affect cookies, content security policy, or cross-origin access controls.
Note:
This is only exploitable if untrusted external input is reflected into response headers.
Workaround
This vulnerability can be mitigated by validating or sanitizing any untrusted input before including it in a response header name or value.