Is CVE-2026-34777 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-34777 being exploited in the wild.

How severe is CVE-2026-34777?

Medium severity, with a CVSS score of 5.4, published 4 April 2026.

Which products and versions are affected?

electron (npm) SEMVER:introduced=0,fixed=38.8.6.

Is there a fix for CVE-2026-34777?

Yes. electron (npm): upgrade to 38.8.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-34777 attacked?

It is attacked over the network, in a software library.

Am I affected by CVE-2026-34777?

Check whether you run electron (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-34777: Electron origin validation error in permission request handler

CVE-2026-34777 · Severity: medium · CVSS 5.4 · Published 2026-04-04

Electron is a popular framework used to build desktop applications like Slack, Discord, and VS Code. A security flaw exists where applications might incorrectly grant sensitive permissions (such as camera access or the ability to open external links) to untrusted third-party content embedded within the app. This happens because the app may mistake a request from an embedded frame for a request from the main, trusted application window.

Technologies: electron (npm). Vendors: npm.

Quick answers

Is CVE-2026-34777 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-34777 being exploited in the wild.
How severe is CVE-2026-34777?: Medium severity, with a CVSS score of 5.4, published 4 April 2026.
Which products and versions are affected?: electron (npm) SEMVER:introduced=0,fixed=38.8.6.
Is there a fix for CVE-2026-34777?: Yes. electron (npm): upgrade to 38.8.6 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-34777 attacked?: It is attacked over the network, in a software library.
Am I affected by CVE-2026-34777?: Check whether you run electron (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

electron (npm): upgrade to 38.8.6 or later
```
npm install electron@38.8.6
```

Technical details

An origin validation error (CWE-346) exists in Electron's permission handling logic. When an iframe requests permissions for fullscreen, pointerLock, keyboardLock, openExternal, or media, the origin passed to the 'session.setPermissionRequestHandler()' callback is incorrectly set to the top-level page's origin instead of the iframe's actual origin. Attackers can exploit this by embedding malicious content that inherits the permissions of the trusted parent window if the application relies on the 'origin' parameter or 'webContents.getURL()' for authorization. The vulnerability is mitigated if developers manually verify 'details.requestingUrl'. Patches are available in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.

Affected products

ElectronJS Electron < 38.8.6, 39.0.0-alpha.1 to < 39.8.1, 40.0.0-alpha.1 to < 40.8.1, 41.0.0-alpha.1 to < 41.0.0

Identifiers

CVE-2026-34777
GHSA-r5p7-gp4j-qhrx

Timeline

2026-04-02: advisory: GitHub Security Advisory published
2026-04-04: disclosed: CVE published to NVD

References

https://github.com/electron/electron/security/advisories/GHSA-r5p7-gp4j-qhrx

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