CVE-2026-70607Network attack vector

File or network access via unallowlisted window options

Published Aug 5, 2026 · Updated Aug 5, 2026

Improper input validation in affected Electron releases allows remote attackers to make the main process access chosen file or network paths. The window.open() features parser applies some web-supplied options to a new BrowserWindow without restricting them to an allowlist. Exploitation requires untrusted content that can call window.open() in an app that neither denies the call nor explicitly overrides every child-window option.

CVSS severity5.3
Medium
EPSS probability0.44%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper input validation in affected Electron releases allows remote attackers to make the main process access chosen file or network paths. The window.open() features parser applies some web-supplied options to a new BrowserWindow without restricting them to an allowlist. Exploitation requires untrusted content that can call window.open() in an app that neither denies the call nor explicitly overrides every child-window option.

The record

CVE
CVE-2026-70607
Published
Aug 5, 2026
Updated
Aug 5, 2026
Vendor
Electron
Product
Electron
Classifications
CWE-20
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

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=< 39.8.8
  2. Affected versionversion=>= 40.0.0-alpha.1, < 40.9.0
  3. Affected versionversion=>= 41.0.0-alpha.1, < 41.2.1
  4. Affected versionversion=>= 42.0.0-alpha.1, < 42.0.0-beta.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Electron · Electronversion=< 39.8.8; version=>= 40.0.0-alpha.1, < 40.9.0; version=>= 41.0.0-alpha.1, < 41.2.1; version=>= 42.0.0-alpha.1, < 42.0.0-beta.3

Published CVSS scores

5.3GitHubCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-20Improper Input Validation

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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