Electron up to 39.8.6/40.8.x/41.1.x/42.0.0-beta.0 Permission Check cross-domain policy

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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3.0$0-$5k0.61+

Summaryinfo

A vulnerability was found in Electron up to 39.8.6/40.8.x/41.1.x/42.0.0-beta.0. It has been classified as problematic. This vulnerability affects unknown code of the component Permission Check. The manipulation leads to cross-domain policy. This vulnerability is traded as CVE-2026-70599. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Electron up to 39.8.6/40.8.x/41.1.x/42.0.0-beta.0. It has been rated as problematic. This issue affects an unknown code block of the component Permission Check. The manipulation with an unknown input leads to a cross-domain policy vulnerability. Using CWE to declare the problem leads to CWE-942. The product uses a cross-domain policy file that includes domains that should not be trusted. Impacted is confidentiality. The summary by CVE is:

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1, serial-port and media permission checks made from an iframe passed the top-level frame origin to session.setPermissionCheckHandler instead of the requesting iframe origin. Origin-based handler logic could grant a cross-origin iframe device access intended only for the top-level origin. This issue is fixed in 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-70599 since 08/04/2026. The exploitation is known to be difficult. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. The technical details are unknown and an exploit is not publicly available.

Upgrading to version 39.8.7, 40.9.0, 41.2.0 or 42.0.0-beta.1 eliminates this vulnerability.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Name

Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 3.1
VulDB Meta Temp Score: 3.0

VulDB Base Score: 3.1
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Cross-domain policy
CWE: CWE-942 / CWE-346 / CWE-345
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Electron 39.8.7/40.9.0/41.2.0/42.0.0-beta.1

Timelineinfo

08/04/2026 CVE reserved
08/05/2026 +1 days Advisory disclosed
08/05/2026 +0 days VulDB entry created
08/05/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-70599 (🔒)
GCVE (CVE): GCVE-0-2026-70599
GCVE (VulDB): GCVE-100-386279

Entryinfo

Created: 08/05/2026 19:09
Changes: 08/05/2026 19:09 (54)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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