GHSA-ff2p-hmqr-hxm4

Suggest an improvement
Source
https://github.com/advisories/GHSA-ff2p-hmqr-hxm4
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-ff2p-hmqr-hxm4/GHSA-ff2p-hmqr-hxm4.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-ff2p-hmqr-hxm4
Aliases
Published
2026-08-05T17:41:20Z
Modified
2026-08-05T17:56:07Z
Severity
  • 5.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N CVSS Calculator
Summary
Electron: contextBridge object copy honors prototype setters
Details

Impact

Objects copied across the contextBridge boundary from untrusted content could carry an attacker-influenced prototype, enabling prototype-pollution-style attacks against preload code despite context isolation being enabled.

Apps are only affected if their preload code accepts object arguments from untrusted content and reads properties from them without own-property checks. Apps that only accept primitive arguments, or that validate object arguments, are not affected.

Workarounds

Validate objects received from untrusted content with own-property checks (Object.hasOwn), or copy them onto a null-prototype object before use.

Fixed Versions

  • 42.0.0-beta.4
  • 41.2.2
  • 40.9.2
  • 39.8.9

For more information

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

Database specific 
{
    "cwe_ids":  [
        "CWE-1321"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-08-05T17:41:20Z",
    "nvd_published_at":  null,
    "severity":  "MODERATE"
}
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
0 Unknown introduced version / All previous versions are affected
Fixed
39.8.9

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-ff2p-hmqr-hxm4/GHSA-ff2p-hmqr-hxm4.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
40.9.2

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-ff2p-hmqr-hxm4/GHSA-ff2p-hmqr-hxm4.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
41.2.2

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-ff2p-hmqr-hxm4/GHSA-ff2p-hmqr-hxm4.json"

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-beta.4

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-ff2p-hmqr-hxm4/GHSA-ff2p-hmqr-hxm4.json"