CVE-2026-70605: Electron: HTTP redirect followed into local file loader
Impact 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 (the default) and expose the response body. Apps that only request fixed, trusted URLs are not affected.
Workarounds Set redirect: 'error' or redirect: 'manual' on requests to untrusted URLs and validate any redirect target before following it.
Fixed Versions 42.0.0-beta.3 41.2.1 40.9.0 39.8.8
For more information If you have any questions or comments about this advisory, email Electron at security@electronjs.org
Other sources
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.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
npm/electronto a version that resolves this vulnerability.Fixed in 42.0.0-beta.3 - Upgrade
Upgrade
npm/electronto a version that resolves this vulnerability.Fixed in 41.2.1 - Upgrade
Upgrade
npm/electronto a version that resolves this vulnerability.Fixed in 40.9.1 - Upgrade
Upgrade
npm/electronto a version that resolves this vulnerability.Fixed in 39.8.8 - Upgrade
Upgrade
Electronto a version that resolves this vulnerability.Fixed in 39.8.8 - Upgrade
Upgrade
Electronto a version that resolves this vulnerability.Fixed in 40.9.0 - Upgrade
Upgrade
Electronto a version that resolves this vulnerability.Fixed in 41.2.1 - Upgrade
Upgrade
Electronto a version that resolves this vulnerability.Fixed in 42.0.0-beta.3 - Configuration
For requests to untrusted URLs, set redirect: 'error' or redirect: 'manual', and validate any redirect target before following it.
Electron net.fetch() / net.request() redirect = error or manual
Event History
Frequently Asked Questions
What is the severity of CVE-2026-70605?
The severity of CVE-2026-70605 is rated as medium with a score of 5.9.
How do I fix CVE-2026-70605?
To fix CVE-2026-70605, implement restrictions on allowed redirect schemes in your application's HTTP request handling.
What is the impact of CVE-2026-70605?
CVE-2026-70605 allows remote servers to redirect requests to local resources, potentially disclosing local file contents.
What software is affected by CVE-2026-70605?
CVE-2026-70605 affects npm and Electron applications that utilize net.fetch() or net.request().
What type of vulnerability is CVE-2026-70605 classified as?
CVE-2026-70605 is classified as a Server-Side Request Forgery (SSRF) vulnerability.