CVE-2026-34776Electron: Out-of-bounds read in second-instance IPC on macOS and Linux
Updated under an hour ago ()
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It affects electron and 1 other product. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0, on macOS and Linux, apps that call app.requestSingleInstanceLock() were vulnerable to an out-of-bounds heap read when parsing a crafted second-instance message. Leaked memory could be delivered to the app's second-instance event handler. This issue is limited to processes running as the same user as the Electron app. Apps that do not call app.requestSingleInstanceLock() are not affected. Windows is not affected by this issue. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.
- CVSS
- 5.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:L
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Analyzed
- Record last updated
- Apr 6, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
electron electron electron:electron (from the name) | before 38.8.6; from 39.0.0-alpha.1, < 39.8.1; from 40.0.0-alpha.1, < 40.8.1; from 41.0.0-alpha.1, < 41.0.0 | CNA record |
electronjs electron electronjs:electron | before 38.8.6; from 39.0.0 before 39.8.1; from 40.0.0 before 40.8.1; 41.0.0; 41.0.0; 41.0.0; 41.0.0; 41.0.0; and 9 more ranges | NVD |
References
- https://github.com/electron/electron/security/advisories/GHSA-3c8v-cfp5-9885x-refsource-confirm, vendor-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.