CVE-2026-34770 json
Electron: Use-after-free in PowerMonitor on Windows and macOS
published 2026-04-03 7 mo ago modified 2026-07-24 3 mo ago also EUVD-2026-18939 , GHSA-jjp3-mq3x-295m
- cvss
- 7.0
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 16%
- public exploits
- 0
- none known
Summary
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8, 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. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.0, and 41.0.0-beta.8.
Patch / fix
- npm electron 38.8.6, 39.8.1, 40.8.0, 41.0.0-beta.8
- atom electron 38.8.6, 39.8.1, 40.8.0, 41.0.0-beta.8
- electronjs electron 38.8.6, 39.8.1, 40.8.0, 41.0.0-beta.8
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 7 mo ago
Exploit prediction
0.25% chance of exploitation in the next 30 days, higher than 16% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| GitHub | 3.1 | 7.0 | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H |
| NVD | 3.1 | 8.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| npm | electron | <38.8.6 >=39.0.0-alpha.1, <39.8.1 >=40.0.0-alpha.1, <40.8.0 >=41.0.0-alpha.1, <41.0.0-beta.8 |
38.8.6 39.8.1 40.8.0 41.0.0-beta.8 |
Affected products
- electron electron
Classification
- Weakness
-
- CWE-416 Use After Free
References
-
github.com
/electron/electron/security/advisories/GHSA-jjp3-mq3x-295m
web, vendor-advisory
-
nvd.nist.gov
/vuln/detail/CVE-2026-34770
advisory
-
github.com
/electron/electron
package
Sources
- CVE List CVE-2026-34770
- GitHub Advisory GHSA-jjp3-mq3x-295m
- NVD CVE-2026-34770
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.