GHSA-v3j7-r9gq-3gjw

Source

https://github.com/advisories/GHSA-v3j7-r9gq-3gjw

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-v3j7-r9gq-3gjw/GHSA-v3j7-r9gq-3gjw.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-v3j7-r9gq-3gjw

Aliases

CVE-2026-70604

Published

2026-08-05T15:59:45Z

Modified

2026-08-05T16:26:04Z

Severity

7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N CVSS Calculator

Summary

Electron: Custom protocol with supportFetchAPI but not corsEnabled allows cross-origin reads

Details

Impact

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. Apps that set corsEnabled: true, or that do not load untrusted content, are not affected.

Workarounds

Set corsEnabled: true on schemes that must enforce CORS, and validate the request Origin in your protocol handler before returning sensitive data.

Fixed Versions

42.0.0
41.4.0
40.9.3
39.8.10

For more information

If you have any questions or comments about this advisory, email Electron at security@electronjs.org

Database specific

{
    "cwe_ids":  [
        "CWE-942"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-08-05T15:59:45Z",
    "nvd_published_at":  null,
    "severity":  "HIGH"
}

References

Affected packages

npm / electron

Package

Name: electron; View open source insights on deps.dev
Purl: pkg:npm/electron

Affected ranges

Type: SEMVER
Events: Introduced

42.0.0-alpha.1

Fixed

42.0.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-v3j7-r9gq-3gjw/GHSA-v3j7-r9gq-3gjw.json"

npm / electron

Package

Name: electron; View open source insights on deps.dev
Purl: pkg:npm/electron

Affected ranges

Type: SEMVER
Events: Introduced

41.0.0-alpha.1

Fixed

41.4.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-v3j7-r9gq-3gjw/GHSA-v3j7-r9gq-3gjw.json"

npm / electron

Package

Name: electron; View open source insights on deps.dev
Purl: pkg:npm/electron

Affected ranges

Type: SEMVER
Events: Introduced

40.0.0-alpha.1

Fixed

40.9.3

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-v3j7-r9gq-3gjw/GHSA-v3j7-r9gq-3gjw.json"

npm / electron

Package

Name: electron; View open source insights on deps.dev
Purl: pkg:npm/electron

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

39.8.10

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-v3j7-r9gq-3gjw/GHSA-v3j7-r9gq-3gjw.json"