CVE & CISA-KEV Catalog

CVE-2026-70604

HIGH
7.4
CVSS v3
NVD

Description

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.10, 40.9.3, 41.4.0, and 42.0.0, a custom scheme registered with supportFetchAPI: true but without corsEnabled: true was not subject to CORS enforcement. A page loaded from a remote origin could therefore fetch() or XMLHttpRequest that scheme cross-origin and read the full response body, rather than the read being blocked. Apps that serve sensitive data from such a scheme and load remote or untrusted content in a renderer are affected. This issue is fixed in versions 39.8.10, 40.9.3, 41.4.0, and 42.0.0.

CWE-942

How to fix

Remediation Available
electronNVD
Affected:< 39.8.10Fixed in:39.8.10CVE-2026-70604derived from NVD
Affected:>= 40.0.0, < 40.9.3Fixed in:40.9.3CVE-2026-70604derived from NVD
Affected:>= 41.0.0, < 41.4.0Fixed in:41.4.0CVE-2026-70604derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionRequired
ScopeChanged

Impact

ConfidentialityHigh
IntegrityNone
AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N

Exploit Intelligence

0.35%probability of exploitation in 30 days
27thpercentile

Low risk: more likely to be exploited than 27% of all known CVEs.

References

Vendor Advisory1

Related Vulnerabilities

Other CWE-942 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2026-22812High8.817%-Fix
CVE-2026-59726Critical10.03.0%--
CVE-2023-38122High7.21.9%-Fix
CVE-2026-84452High8.61.6%--
CVE-2026-61736Critical9.31.4%--
CVE-2023-38125High8.81.3%-Fix

Common questions

How do I fix CVE-2026-70604?

Upgrade electron to 39.8.10 or later.

Is CVE-2026-70604 being actively exploited?

Not that we know of. CVE-2026-70604 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.35% is the estimated probability that it will be exploited in the next 30 days. That is higher than 27% of all scored CVEs.

How severe is CVE-2026-70604?

CVE-2026-70604 has a CVSS v3 base score of 7.4, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-70604 affect?

Published advisories record a fix for electron (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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CVE-2026-70604 severity badge

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-10-08.