CVE-2026-34772 Electron: Use-after-free in download save dialog callback
Attackers can trigger a use-after-free in Electron apps by destroying sessions during download dialogs, potentially causing crashes or code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-34772?
CVE-2026-34772 is a medium-severity use after free vulnerability in Electronjs Electron, published on 3 Apr 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that allow downloads and programmatically destroy sessions may be vulnerable to a use-after-free. If a session is torn down while a native save-file dialog is open for a download, 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.
Weakness: CWE-416
Which versions are affected by CVE-2026-34772?
8 open source packages ship an affected version, including electron. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
electron npm | All versions | 38.8.6 |
electron npm | All versions | 38.8.6 |
electron npm | From 39.0.0-alpha.1 | 39.8.0 |
electron npm | From 39.0.0-alpha.1 | 39.8.0 |
electron npm | From 40.0.0-alpha.1 | 40.7.0 |
electron npm | From 40.0.0-alpha.1 | 40.7.0 |
2 more packages
electron npm | From 41.0.0-alpha.1 | 41.0.0-beta.7 |
electron npm | From 41.0.0-alpha.1 | 41.0.0-beta.7 |
Products include Electronjs Electron.
How do I fix CVE-2026-34772?
Upgrade electron to a fixed version for your release line: 38.8.6, 39.8.0, 40.7.0 or 41.0.0-beta.7.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-34772 being exploited?
There is no known exploitation of CVE-2026-34772 in the wild and no public exploit code.
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- CVE-2026-34780 Electron: Context Isolation bypass via contextBridge VideoFrame transfer
- CVE-2026-102676 Electron: <webview> can enable Node.js integration in Web Workers despite embedder restrictions
- CVE-2026-102673 Electron drops inherited HTML sandbox restrictions for popups opened through OpenURLFromTab
Sources
Also known as GHSA-9w97-2464-8783.