Electron: Cross-origin iframe can position native autofill popup (CVE-2026-70600)
A vulnerability in Electron allows a cross-origin iframe to position the native autofill popup outside its bounds, overlaying the embedding page's UI. This can enable clickjacking or spoofing of trusted UI elements. Only applications embedding untrusted content in iframes within windows that also display trusted UI are affected. Versions prior to 39.8.8 are vulnerable. Fixed versions include 39.8.8 and later. The vulnerability has a low CVSS score of 3.1.
AI Analysis
Technical Summary
CVE-2026-70600 is a low-severity vulnerability in Electron where a cross-origin iframe can manipulate the position of the native autofill popup beyond the iframe's boundaries, potentially overlaying trusted UI elements on the embedding page. This behavior can be exploited for clickjacking or UI spoofing attacks. The issue affects Electron versions before 39.8.8. The vulnerability only impacts applications that embed untrusted third-party content in iframes alongside trusted UI. Electron has released fixed versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3 that address this issue.
Potential Impact
The vulnerability allows a cross-origin iframe to position the native autofill popup outside its iframe bounds, overlaying the embedding page's trusted UI. This can enable clickjacking or spoofing attacks, potentially misleading users into interacting with malicious UI elements. However, the impact is limited to applications that embed untrusted content in iframes within windows displaying trusted UI. There is no confidentiality or availability impact reported.
Mitigation Recommendations
A fix is available in Electron versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3. Users and developers should upgrade to one of these versions or later. As a workaround, avoid embedding untrusted content in iframes inside windows that also display trusted UI. No other mitigations are specified.
Electron: Cross-origin iframe can position native autofill popup (CVE-2026-70600)
Description
A vulnerability in Electron allows a cross-origin iframe to position the native autofill popup outside its bounds, overlaying the embedding page's UI. This can enable clickjacking or spoofing of trusted UI elements. Only applications embedding untrusted content in iframes within windows that also display trusted UI are affected. Versions prior to 39.8.8 are vulnerable. Fixed versions include 39.8.8 and later. The vulnerability has a low CVSS score of 3.1.
CVSS v3.1
Score 3.1low
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-70600 is a low-severity vulnerability in Electron where a cross-origin iframe can manipulate the position of the native autofill popup beyond the iframe's boundaries, potentially overlaying trusted UI elements on the embedding page. This behavior can be exploited for clickjacking or UI spoofing attacks. The issue affects Electron versions before 39.8.8. The vulnerability only impacts applications that embed untrusted third-party content in iframes alongside trusted UI. Electron has released fixed versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3 that address this issue.
Potential Impact
The vulnerability allows a cross-origin iframe to position the native autofill popup outside its iframe bounds, overlaying the embedding page's trusted UI. This can enable clickjacking or spoofing attacks, potentially misleading users into interacting with malicious UI elements. However, the impact is limited to applications that embed untrusted content in iframes within windows displaying trusted UI. There is no confidentiality or availability impact reported.
Mitigation Recommendations
A fix is available in Electron versions 39.8.8, 40.9.0, 41.2.1, and 42.0.0-beta.3. Users and developers should upgrade to one of these versions or later. As a workaround, avoid embedding untrusted content in iframes inside windows that also display trusted UI. No other mitigations are specified.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-x8rc-wpg4-grpf
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-70600"]
- Ecosystems
- ["npm"]
- Database Specific Severity
- LOW
- Cvss Version
- 3.1
Threat ID: 6a73851fbf8831d5394ef8d1
Added to database: 08/05/2026, 18:46:55 UTC
Last enriched: 08/05/2026, 23:01:40 UTC
Last updated: 08/06/2026, 01:58:12 UTC
Views: 6
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