CVE-2026-34781 Electron crashes in clipboard.readImage() on malformed clipboard image data
Attackers can crash Electron applications by placing malformed image data in the system clipboard, causing a null dereference in clipboard.readImage().
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-34781?
CVE-2026-34781 is a low-severity vulnerability in Electronjs Electron, published on 7 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 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5, apps that call clipboard.readImage() may be vulnerable to a denial of service. If the system clipboard contains image data that fails to decode, the resulting null bitmap is passed unchecked to image construction, triggering a controlled abort and crashing the process. Apps are only affected if they call clipboard.readImage(). Apps that do not read images from the clipboard are not affected. This issue does not allow memory corruption or code execution. This vulnerability is fixed in 39.8.5, 40.8.5, 41.1.0, and 42.0.0-alpha.5.
Weakness: CWE-476
Which versions are affected by CVE-2026-34781?
8 open source packages ship an affected version, including electron. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
electron npm | All versions | 39.8.5 |
electron npm | All versions | 39.8.5 |
electron npm | From 40.0.0-alpha.1 | 40.8.5 |
electron npm | From 40.0.0-alpha.1 | 40.8.5 |
electron npm | From 41.0.0-alpha.1 | 41.1.0 |
electron npm | From 41.0.0-alpha.1 | 41.1.0 |
2 more packages
electron npm | From 42.0.0-alpha.1 | 42.0.0-alpha.5 |
electron npm | From 42.0.0-alpha.1 | 42.0.0-alpha.5 |
Products include Electronjs Electron.
How do I fix CVE-2026-34781?
Upgrade electron to a fixed version for your release line: 39.8.5, 40.8.5, 41.1.0 or 42.0.0-alpha.5.
Is CVE-2026-34781 being exploited?
There is no known exploitation of CVE-2026-34781 in the wild and no public exploit code.
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Sources
Also known as GHSA-f37v-82c4-4x64.