GHSA-3c8v-cfp5-9885

Source

https://github.com/advisories/GHSA-3c8v-cfp5-9885

Import Source

https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/04/GHSA-3c8v-cfp5-9885/GHSA-3c8v-cfp5-9885.json

JSON Data

https://api.osv.dev/v1/vulns/GHSA-3c8v-cfp5-9885

Aliases

CVE-2026-34776

Published

2026-04-03T02:43:59Z

Modified

2026-04-06T23:20:11.001628Z

Severity

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

Summary

Electron: Out-of-bounds read in second-instance IPC on macOS and Linux

Details

Impact

On macOS and Linux, apps that call app.requestSingleInstanceLock() were vulnerable to an out-of-bounds heap read when parsing a crafted second-instance message. Leaked memory could be delivered to the app's second-instance event handler.

This issue is limited to processes running as the same user as the Electron app.

Apps that do not call app.requestSingleInstanceLock() are not affected. Windows is not affected by this issue.

Workarounds

There are no app side workarounds, developers must update to a patched version of Electron.

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

{
    "nvd_published_at": "2026-04-04T00:16:18Z",
    "severity": "MODERATE",
    "github_reviewed": true,
    "cwe_ids": [
        "CWE-125"
    ],
    "github_reviewed_at": "2026-04-03T02:43:59Z"
}

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-3c8v-cfp5-9885/GHSA-3c8v-cfp5-9885.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-3c8v-cfp5-9885/GHSA-3c8v-cfp5-9885.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-3c8v-cfp5-9885/GHSA-3c8v-cfp5-9885.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-3c8v-cfp5-9885/GHSA-3c8v-cfp5-9885.json"