Electron: Service worker can spoof executeJavaScript IPC replies
Priority LOW 28CWE-290Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- None · High · None
- Fix status
- Partial Red Hat: 2 without a fix
Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-290.
Summary
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, 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. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00129 2nd percentileScored 2026-11-07
Fix Partial electron (electron): 38.8.6, 39.8.1, 40.8.1 +1electron (npm): 38.8.6, 39.8.1, 40.8.1 +1Red Hat: 2 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| electron | electron | before 38.8.6; 39.0.0-alpha.1 to before 39.8.1; 40.0.0-alpha.1 to before 40.8.1; 41.0.0-alpha.1 to before 41.0.0 | 38.8.6, 39.8.1, 40.8.1, 41.0.0 | Patch available | CNA |
| — | electron (npm) | before 38.8.6 | 38.8.6 | Patch available | GHSA-xj5x-m3f3-5x3h |
| — | electron (npm) | 39.0.0-alpha.1 to before 39.8.1 | 39.8.1 | Patch available | GHSA-xj5x-m3f3-5x3h |
| — | electron (npm) | 40.0.0-alpha.1 to before 40.8.1 | 40.8.1 | Patch available | GHSA-xj5x-m3f3-5x3h |
| — | electron (npm) | 41.0.0-alpha.1 to before 41.0.0 | 41.0.0 | Patch available | GHSA-xj5x-m3f3-5x3h |
- electron Vendorelectron Affected before 38.8.6; 39.0.0-alpha.1 to before 39.8.1; 40.0.0-alpha.1 to before 40.8.1; 41.0.0-alpha.1 to before 41.0.0 Fixed in 38.8.6, 39.8.1, 40.8.1, 41.0.0 Patch available CNA
- electron (npm) Vendor— Affected before 38.8.6 Fixed in 38.8.6 Patch available GHSA-xj5x-m3f3-5x3h
- electron (npm) Vendor— Affected 39.0.0-alpha.1 to before 39.8.1 Fixed in 39.8.1 Patch available GHSA-xj5x-m3f3-5x3h
- electron (npm) Vendor— Affected 40.0.0-alpha.1 to before 40.8.1 Fixed in 40.8.1 Patch available GHSA-xj5x-m3f3-5x3h
- electron (npm) Vendor— Affected 41.0.0-alpha.1 to before 41.0.0 Fixed in 41.0.0 Patch available GHSA-xj5x-m3f3-5x3h
CPE configurations NVD · 15
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:* | before 38.8.6; 39.0.0 to before 39.8.1; 40.0.0 to before 40.8.1 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:alpha1:*:*:*:node.js:*:* | 41.0.0 alpha1 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:alpha2:*:*:*:node.js:*:* | 41.0.0 alpha2 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:alpha3:*:*:*:node.js:*:* | 41.0.0 alpha3 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:alpha4:*:*:*:node.js:*:* | 41.0.0 alpha4 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:alpha5:*:*:*:node.js:*:* | 41.0.0 alpha5 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:alpha6:*:*:*:node.js:*:* | 41.0.0 alpha6 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:beta1:*:*:*:node.js:*:* | 41.0.0 beta1 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:beta2:*:*:*:node.js:*:* | 41.0.0 beta2 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:beta3:*:*:*:node.js:*:* | 41.0.0 beta3 | Vulnerable | Electronjs |
- cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:* Versions before 38.8.6; 39.0.0 to before 39.8.1; 40.0.0 to before 40.8.1 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:alpha1:*:*:*:node.js:*:* Versions 41.0.0 alpha1 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:alpha2:*:*:*:node.js:*:* Versions 41.0.0 alpha2 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:alpha3:*:*:*:node.js:*:* Versions 41.0.0 alpha3 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:alpha4:*:*:*:node.js:*:* Versions 41.0.0 alpha4 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:alpha5:*:*:*:node.js:*:* Versions 41.0.0 alpha5 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:alpha6:*:*:*:node.js:*:* Versions 41.0.0 alpha6 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:beta1:*:*:*:node.js:*:* Versions 41.0.0 beta1 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:beta2:*:*:*:node.js:*:* Versions 41.0.0 beta2 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:beta3:*:*:*:node.js:*:* Versions 41.0.0 beta3 Vulnerable ·Electronjs
Show 5 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:electronjs:electron:41.0.0:beta4:*:*:*:node.js:*:* | 41.0.0 beta4 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:beta5:*:*:*:node.js:*:* | 41.0.0 beta5 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:beta6:*:*:*:node.js:*:* | 41.0.0 beta6 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:beta7:*:*:*:node.js:*:* | 41.0.0 beta7 | Vulnerable | Electronjs |
| cpe:2.3:a:electronjs:electron:41.0.0:beta8:*:*:*:node.js:*:* | 41.0.0 beta8 | Vulnerable | Electronjs |
- cpe:2.3:a:electronjs:electron:41.0.0:beta4:*:*:*:node.js:*:* Versions 41.0.0 beta4 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:beta5:*:*:*:node.js:*:* Versions 41.0.0 beta5 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:beta6:*:*:*:node.js:*:* Versions 41.0.0 beta6 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:beta7:*:*:*:node.js:*:* Versions 41.0.0 beta7 Vulnerable ·Electronjs
- cpe:2.3:a:electronjs:electron:41.0.0:beta8:*:*:*:node.js:*:* Versions 41.0.0 beta8 Vulnerable ·Electronjs
Remediation
- Fix · CNA electron (electron) Fixed in 38.8.6, 39.8.1, 40.8.1, 41.0.0
- Fix · GHSA-xj5x-m3f3-5x3h electron (npm) Fixed in 38.8.6 Advisory →
- Fix · GHSA-xj5x-m3f3-5x3h electron (npm) Fixed in 39.8.1 Advisory →
- Fix · GHSA-xj5x-m3f3-5x3h electron (npm) Fixed in 40.8.1 Advisory →
- Fix · GHSA-xj5x-m3f3-5x3h electron (npm) Fixed in 41.0.0 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Build of Podman Desktop | Affected | No fix yet: Fix deferred |
| Red Hat Build of Podman Desktop - Tech Preview | Affected | No fix yet: Fix deferred |
Timeline
- 2026-10-02 Threatist record created from CVE-2026-34778
- 2026-10-03 Alias added: GHSA-xj5x-m3f3-5x3h
References
More electron vulnerabilities
- TI-2026-39496 Information disclosure in electron-builder CVSS 4.0HIGH 8.2
- TI-2024-26621 Code Signing Bypass on Windows in electron-updater < 6.3.0-alpha.6 CVSS 3.1HIGH 7.5
- TI-2023-09452 Content-Secrity-Policy disabling eval not applied consistently in renderers with sandbox disabled in Electron CVSS 3.1CRITICAL 9.8
- TI-2026-39157 Electron: Buffer performs incorrect byte length calculations resulting in heap buffer under/overflow CVSS 4.0CRITICAL 9.3
- TI-2017-09308 GitHub Electron before 1.6.8 allows remote command execution because of a nodeIntegration… CVSS 3.0HIGH 8.1
- TI-2022-11788 Exposure of Resource to Wrong Sphere in Electron CVSS 3.1CRITICAL 9.8
Sources
- CVE-2026-34778 · CVE Program
- CVE-2026-34778 · NVD
- FIRST EPSS
- GHSA-xj5x-m3f3-5x3h · GitHub Advisory Database · CC BY 4.0
- CVE-2026-34778 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences