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CVE-2026-70611

Electron: DevTools embedder handler executes arbitrary files via shell open

6.9 MediumFix available

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3, the DevTools reveal in file manager action could launch the target file rather than reveal it. An attacker with a separate means of running script inside the DevTools frontend, such as a malicious DevTools extension, could use showItemInFolder handling to execute native code outside the sandbox when DevTools is opened for windows exposed to untrusted content or untrusted DevTools extensions. This issue is fixed in 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3.

Attack profile

How easy it is to exploit

Attack vector
Local
Complexity
High
Privileges needed
High
User interaction
Required

What an attacker can affect

Confidentiality
High
Integrity
High
Availability
None

Exploit likelihood

0.19%Up 0.1 points since Aug 6, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.9

Electron: DevTools embedder handler executes arbitrary files via shell open

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3, the DevTools reveal in file manager action could launch the target file rather than reveal it. An attacker with a separate means of running script inside the DevTools frontend, such as a malicious DevTools extension, could use showItemInFolder handling to execute native code outside the sandbox when DevTools is opened for windows exposed to untrusted content or untrusted DevTools extensions. This issue is fixed in 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3.

Record
CVE-2026-70611
CVSS 3.1
6.9 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-78
Updated
2026-11-03
EUVDEUVD-2026-53545 6.9

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3, the DevTools reveal in file manager action could launch the target file rather than reveal it. An attacker with a separate means of running script inside the DevTools frontend, such as a malicious DevTools extension, could use showItemInFolder handling to execute native code outside the sandbox when DevTools is opened for windows exposed to untrusted content or untrusted DevTools extensions. This issue is fixed in 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3.

Record
EUVD-2026-53545
CVSS 3.1
6.9 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
Updated
2026-11-03
GitHub AdvisoriesGHSA-f2r8-jv7c-xqmp 6.9

Electron: DevTools embedder handler executes arbitrary files via shell open

Impact

The DevTools "reveal in file manager" action could launch the target file rather than reveal it. An attacker with a separate means of running script inside the DevTools frontend (such as a malicious DevTools extension) could use this to execute native code outside the sandbox.

Apps are only affected if DevTools is opened for windows exposed to untrusted content or untrusted DevTools extensions. Apps that do not open DevTools in that context are not affected.

Workarounds

Do not open DevTools for windows that load untrusted content, and do not load untrusted DevTools extensions.

Fixed Versions

  • 42.0.0-beta.3
  • 41.2.1
  • 40.9.2
  • 39.8.9

For more information

If you have any questions or comments about this advisory, email Electron at [email protected]

Record
GHSA-f2r8-jv7c-xqmp
CVSS 3.1
6.9 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-78
Updated
2026-11-02
NVD 6.9

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3, the DevTools reveal in file manager action could launch the target file rather than reveal it. An attacker with a separate means of running script inside the DevTools frontend, such as a malicious DevTools extension, could use showItemInFolder handling to execute native code outside the sandbox when DevTools is opened for windows exposed to untrusted content or untrusted DevTools extensions. This issue is fixed in 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3.

Record
CVE-2026-70611
CVSS 3.1
6.9 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-78
Updated
2026-11-04
OSV 6.9

Electron: DevTools embedder handler executes arbitrary files via shell open

Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3, the DevTools reveal in file manager action could launch the target file rather than reveal it. An attacker with a separate means of running script inside the DevTools frontend, such as a malicious DevTools extension, could use showItemInFolder handling to execute native code outside the sandbox when DevTools is opened for windows exposed to untrusted content or untrusted DevTools extensions. This issue is fixed in 39.8.9, 40.9.2, 41.2.1, and 42.0.0-beta.3.

Record
CVE-2026-70611
CVSS 3.1
6.9 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-78
Updated
2026-11-05
OSVGHSA-f2r8-jv7c-xqmp 6.9

Electron: DevTools embedder handler executes arbitrary files via shell open

Impact

The DevTools "reveal in file manager" action could launch the target file rather than reveal it. An attacker with a separate means of running script inside the DevTools frontend (such as a malicious DevTools extension) could use this to execute native code outside the sandbox.

Apps are only affected if DevTools is opened for windows exposed to untrusted content or untrusted DevTools extensions. Apps that do not open DevTools in that context are not affected.

Workarounds

Do not open DevTools for windows that load untrusted content, and do not load untrusted DevTools extensions.

Fixed Versions

  • 42.0.0-beta.3
  • 41.2.1
  • 40.9.2
  • 39.8.9

For more information

If you have any questions or comments about this advisory, email Electron at [email protected]

Record
GHSA-f2r8-jv7c-xqmp
CVSS 3.1
6.9 MediumCVSS:3.1/AV:L/AC:H/PR:H/UI:R/S:C/C:H/I:H/A:N
Weakness
CWE-78
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
electron
npm
 before 39.8.9
39.8.9
electron
npm
 40.0.0-alpha.1 up to 40.9.2
40.9.2
electron
npm
 41.0.0-alpha.1 up to 41.2.1
41.2.1
electron
npm
 42.0.0-alpha.1 up to 42.0.0-beta.3
42.0.0-beta.3

History

History
RecordedChangedSources
factsCVE List, EUVD
aliases, publishedEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-70611 is a medium vulnerability (CVSS 6.9) in Electron, published August 5, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.19%, the 8th percentile. Fixed in electron 39.8.9.

References

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