CVE-2026-70605
Electron: HTTP redirect followed into local file loader
Record summary
CVE-2026-70605 has a selected CVSS score of 5.9 (medium).
Description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, when following HTTP redirects, net.fetch() and net.request() did not restrict which schemes a redirect could target. A remote server could redirect a request to a local resource, and if the app returns or forwards the response body, local file contents could be disclosed. Apps are only affected if they make net requests to attacker-influenced URLs with redirects followed and expose the response body. This issue is fixed in versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.
Exploitation context
CISA SSVC decision
CISA Coordinator · SSVC 2.0.3 · Evaluated Aug 6, 2026 · Source: CVE List
Affected products and versions
2| Product | Source | Version range | Status |
|---|---|---|---|
electronBrowse electron / electron | CVE List | < 39.8.8 | affected |
| >= 40.0.0-alpha.1, < 40.9.0 | affected | ||
| >= 41.0.0-alpha.1, < 41.2.1 | affected | ||
| >= 42.0.0-alpha.1, < 42.0.0-beta.3 | affected | ||
electronBrowse npm / electron | GitHub Advisory | Before 39.8.8 · Fixed in 39.8.8 | affected |
| 40.0.0-alpha.1 to < 40.9.1 · Fixed in 40.9.1 | affected | ||
| 41.0.0-alpha.1 to < 41.2.1 · Fixed in 41.2.1 | affected | ||
| 42.0.0-alpha.1 to < 42.0.0-beta.3 · Fixed in 42.0.0-beta.3 | affected |