PatchSiren

PatchSiren cyber security CVE debrief

CVE-2026-34770 Electronjs CVE debrief

CVE-2026-34770 is a high-severity use-after-free vulnerability in Electron, a framework for building cross-platform desktop applications. The vulnerability exists in the powerMonitor module and may allow attackers to cause a crash or memory corruption. Electron versions prior to 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8 are affected. This vulnerability is not directly renderer-controllable. The issue arises when the native PowerMonitor object is garbage-collected, leaving dangling references to OS-level resources. A subsequent session-change event or system shutdown can then dereference the freed memory, leading to a crash or memory corruption.

Vendor
Electronjs
Product
Electron
CVSS
HIGH 7
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 utilize the powerMonitor module should be aware of this vulnerability and take steps to mitigate it. This includes updating to a patched version of Electron and monitoring for potential attacks. Additionally, security teams and operators should review their application versions and ensure that they are running a patched version of Electron.

Technical summary

The vulnerability exists in the powerMonitor module of Electron, which is used to monitor system events such as suspend, resume, and lock-screen. When the native PowerMonitor object is garbage-collected, the associated OS-level resources retain dangling references. A subsequent session-change event or system shutdown can then dereference the freed memory, leading to a crash or memory corruption. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8 of Electron.

Defensive priority

High

Recommended defensive actions

  • Update Electron to version 38.8.6, 39.8.1, 40.8.0, or 41.0.0-beta.8 or later
  • Monitor for potential attacks using the powerMonitor module
  • Implement additional security measures such as memory protection and address space layout randomization
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record was published on 2026-04-04T00:16:17.823Z and last modified on 2026-07-24T22:10:00.140Z. The NVD entry is currently Analyzed. The Electron framework versions prior to 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8 are affected by this vulnerability. Developers and users should verify their application versions and update to a patched version as soon as possible.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-34770 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-34770

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-34770 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-34770

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.