CVE-2026-70599Network attack vector

Cross-origin device access via top-frame origin confusion

Published Aug 5, 2026 · Updated Aug 5, 2026

Origin validation error in affected Electron releases allows remote attackers to access cameras, microphones, or serial ports. WebContentsPermissionHelper::CheckPermission substituted GetPrimaryMainFrame() and the top-level committed URL for the requesting iframe when calling setPermissionCheckHandler. Exposure requires origin-based handler logic and a cross-origin iframe delegated camera, microphone, or serial permission; the consequence is unauthorized device access.

CVSS severity5.9
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in affected Electron releases allows remote attackers to access cameras, microphones, or serial ports. WebContentsPermissionHelper::CheckPermission substituted GetPrimaryMainFrame() and the top-level committed URL for the requesting iframe when calling setPermissionCheckHandler. Exposure requires origin-based handler logic and a cross-origin iframe delegated camera, microphone, or serial permission; the consequence is unauthorized device access.

The record

CVE
CVE-2026-70599
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
Electron
Product
Electron
Classifications
CWE-346, T1125, T1123
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 39.8.7
  2. Affected versionversion=>= 40.0.0-alpha.1, < 40.9.0
  3. Affected versionversion=>= 41.0.0-alpha.1, < 41.2.0
  4. Affected versionversion=>= 42.0.0-alpha.1, < 42.0.0-beta.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Electron · Electronversion=< 39.8.7; version=>= 40.0.0-alpha.1, < 40.9.0; version=>= 41.0.0-alpha.1, < 41.2.0; version=>= 42.0.0-alpha.1, < 42.0.0-beta.1

Published CVSS scores

5.9GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-346Origin Validation Error
T1125Video Capture
T1123Audio Capture

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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