CVE-2026-70600 json
Electron: Cross-origin iframe can position native autofill popup
published 2026-08-05 3 mo ago modified 2026-10-08 31 d ago also GHSA-x8rc-wpg4-grpf , EUVD-2026-53432
- cvss
- 3.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 7%
- public exploits
- 0
- none known
Summary
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3, the native autofill popup could be positioned by a cross-origin iframe outside that iframe's bounds, over the embedding page's UI, enabling clickjacking or spoofing of trusted UI. Apps are only affected if they embed untrusted content in iframes within windows that also display trusted UI. Apps that do not embed untrusted third-party content are not affected. This issue is fixed in versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3.
Patch / fix
- npm electron 39.8.8, 40.9.1, 41.2.1, 42.0.0-beta.3
- electronjs electron 39.8.8, 40.9.0
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 3 mo ago
Exploit prediction
0.18% chance of exploitation in the next 30 days, higher than 7% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N |
| NVD | 3.1 | 4.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N |
| GitHub | 3.1 | 3.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | electron | <39.8.8 >=40.0.0-alpha.1, <40.9.1 >=41.0.0-alpha.1, <41.2.1 >=42.0.0-alpha.1, <42.0.0-beta.3 |
39.8.8 40.9.1 41.2.1 42.0.0-beta.3 |
Affected products
- electron electron
Classification
- Weakness
-
- CWE-1021 Improper Restriction of Rendered UI Layers or Frames
References
-
github.com
/electron/electron/security/advisories/GHSA-x8rc-wpg4-grpf
web, vendor-advisory
-
github.com
/electron/electron
package
Sources
- CVE List CVE-2026-70600
- GitHub Advisory GHSA-x8rc-wpg4-grpf
- NVD CVE-2026-70600
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.