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CVE-2026-34772 Electronjs CVE debrief

A use-after-free vulnerability exists in Electron, a framework for writing cross-platform desktop applications, prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8. The vulnerability occurs when a session is torn down while a native save-file dialog is open for a download, and dismissing the dialog dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not destroy sessions at runtime, or that do not permit downloads, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.

Vendor
Electronjs
Product
Electron
CVSS
MEDIUM 5.8
CISA KEV
Not listed in stored evidence
Original CVE published
2026-04-04
Original CVE updated
2026-07-24
Advisory published
2026-04-04
Advisory updated
2026-07-24

Who should care

Developers and users of Electron applications that allow downloads and programmatically destroy sessions should be aware of this vulnerability and take steps to mitigate it. This includes updating to a patched version of Electron and reviewing application code to ensure that sessions are not torn down while save-file dialogs are open. Additionally, operators and security teams managing Electron applications should verify their deployments and plan for updates or mitigations as necessary.

Technical summary

The vulnerability is caused by a use-after-free error when a session is torn down while a native save-file dialog is open for a download. This occurs because the dialog dereferences freed memory when dismissed, potentially leading to a crash or memory corruption. The issue is patched in Electron versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8. Affected versions include Electron 38.x prior to 38.8.6, 39.x prior to 39.8.0, 40.x prior to 40.7.0, and 41.0.0-beta versions prior to beta.8. Developers should review application code to ensure sessions are not torn down while save-file dialogs are open.

Defensive priority

Medium

Recommended defensive actions

  • Update Electron to version 38.8.6, 39.8.0, 40.7.0, or 41.0.0-beta.8 or later
  • Review application code to ensure sessions are not torn down while save-file dialogs are open
  • Verify that applications do not destroy sessions at runtime or permit downloads
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up.
  • Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.
  • Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed.
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review.

Evidence notes

The CVE record was published on 2026-04-04T00:16:18.133Z and has not been modified since then. The NVD entry is currently Analyzed. This information is based on the provided source corpus and may not reflect additional details from other sources. Further verification is recommended to ensure comprehensive understanding of the vulnerability.

Official resources

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-04-04T00:16:18.133Z and has not been modified since then.