CVE-2026-34781

Workarounds

Validate that the clipboard contains image data via clipboard.availableFormats() before calling clipboard.readImage(). Note this only narrows the window, upgrading to a fixed version is recommended.

Fixed Versions

• 42.0.0-alpha.5
• 41.1.0
• 40.8.5
• 39.8.5

For more information

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

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.

The application dereferences a null pointer, causing a crash. Typical impact: denial of service via crash.

CVE-2026-34781 has a CVSS score of 2.8 (Low). The vector is requires local access, low privileges required, and user interaction required. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (39.8.5, 40.8.5, 41.1.0, 42.0.0-alpha.5); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2026-34781? CVE-2026-34781 is a low-severity null pointer dereference vulnerability in electron (npm), affecting versions < 39.8.5. It is fixed in 39.8.5, 40.8.5, 41.1.0, 42.0.0-alpha.5. The application dereferences a null pointer, causing a crash.
2. How severe is CVE-2026-34781? CVE-2026-34781 has a CVSS score of 2.8 (Low). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of electron are affected by CVE-2026-34781? electron (npm) versions < 39.8.5 is affected.
4. Is there a fix for CVE-2026-34781? Yes. CVE-2026-34781 is fixed in 39.8.5, 40.8.5, 41.1.0, 42.0.0-alpha.5. Upgrade to this version or later.
5. Is CVE-2026-34781 exploitable, and should I be worried? Whether CVE-2026-34781 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether CVE-2026-34781 is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix CVE-2026-34781?
   • Upgrade electron to 39.8.5 or later
   • Upgrade electron to 40.8.5 or later
   • Upgrade electron to 41.1.0 or later
   • Upgrade electron to 42.0.0-alpha.5 or later