GHSA-xj5x-m3f3-5x3h

Source

https://github.com/advisories/GHSA-xj5x-m3f3-5x3h

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-xj5x-m3f3-5x3h/GHSA-xj5x-m3f3-5x3h.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-xj5x-m3f3-5x3h

Aliases

CVE-2026-34778

Published

2026-04-03T02:44:59Z

Modified

2026-04-06T23:20:03.666450Z

Severity

5.9 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:H/A:N CVSS Calculator

Summary

Electron: Service worker can spoof executeJavaScript IPC replies

Details

Impact

A service worker running in a session could spoof reply messages on the internal IPC channel used by webContents.executeJavaScript() and related methods, causing the main-process promise to resolve with attacker-controlled data.

Apps are only affected if they have service workers registered and use the result of webContents.executeJavaScript() (or webFrameMain.executeJavaScript()) in security-sensitive decisions.

Workarounds

Do not trust the return value of webContents.executeJavaScript() for security decisions. Use dedicated, validated IPC channels for security-relevant communication with renderers.

Fixed Versions

41.0.0
40.8.1
39.8.1
38.8.6

For more information

If there are any questions or comments about this advisory, please email security@electronjs.org

Database specific

{
    "severity": "MODERATE",
    "cwe_ids": [
        "CWE-290",
        "CWE-345"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-04-03T02:44:59Z",
    "nvd_published_at": "2026-04-04T00:16:19Z"
}

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

0Unknown introduced version / All previous versions are affected

Fixed

38.8.6

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-xj5x-m3f3-5x3h/GHSA-xj5x-m3f3-5x3h.json"

npm / electron

Package

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

Affected ranges

Type: SEMVER
Events: Introduced

39.0.0-alpha.1

Fixed

39.8.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-xj5x-m3f3-5x3h/GHSA-xj5x-m3f3-5x3h.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

40.8.1

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-xj5x-m3f3-5x3h/GHSA-xj5x-m3f3-5x3h.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

41.0.0

Database specific

source

"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-xj5x-m3f3-5x3h/GHSA-xj5x-m3f3-5x3h.json"