CVE-2026-34770

Workarounds

There are no app side workarounds, you must update to a patched version of Electron.

Fixed Versions

• 41.0.0-beta.8
• 40.8.0
• 39.8.1
• 38.8.6

For more information

If there are any questions or comments about this advisory, please email [email protected]

Apps that use the powerMonitor module may be vulnerable to a use-after-free. After the native PowerMonitor object is garbage-collected, the associated OS-level resources (a message window on Windows, a shutdown handler on macOS) retain dangling references. A subsequent session-change event (Windows) or system shutdown (macOS) dereferences freed memory, which may lead to a crash or memory corruption.

All apps that access powerMonitor events (suspend, resume, lock-screen, etc.) are potentially affected. The issue is not directly renderer-controllable.

Memory is accessed after it has been freed, leading to undefined behavior in native code. Typical impact: memory corruption, crash, or potential code execution.

CVE-2026-34770 has a CVSS score of 7.0 (High). The vector is requires local access, no 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 (38.8.6, 39.8.1, 40.8.0, 41.0.0-beta.8); upgrading removes the vulnerable code path.

Kodem intelligence

1. What is CVE-2026-34770? CVE-2026-34770 is a high-severity use after free vulnerability in electron (npm), affecting versions < 38.8.6. It is fixed in 38.8.6, 39.8.1, 40.8.0, 41.0.0-beta.8. Memory is accessed after it has been freed, leading to undefined behavior in native code.
2. How severe is CVE-2026-34770? CVE-2026-34770 has a CVSS score of 7.0 (High). 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-2026-34770? electron (npm) versions < 38.8.6 is affected.
4. Is there a fix for CVE-2026-34770? Yes. CVE-2026-34770 is fixed in 38.8.6, 39.8.1, 40.8.0, 41.0.0-beta.8. Upgrade to this version or later.
5. Is CVE-2026-34770 exploitable, and should I be worried? Whether CVE-2026-34770 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-2026-34770 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-2026-34770?
   • Upgrade electron to 38.8.6 or later
   • Upgrade electron to 39.8.1 or later
   • Upgrade electron to 40.8.0 or later
   • Upgrade electron to 41.0.0-beta.8 or later