CVE-2026-34773
Last modified
CVE-2026-34773 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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 Windows, app.setAsDefaultProtocolClient(protocol) did not validate the protocol name before writing to the registry. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
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 Windows, app.setAsDefaultProtocolClient(protocol) did not validate the protocol name before writing to the registry. Apps that pass untrusted input as the protocol name may allow an attacker to write to arbitrary subkeys under HKCU\Software\Classes\, potentially hijacking existing protocol handlers. Apps are only affected if they call app.setAsDefaultProtocolClient() with a protocol name derived from external or untrusted input. Apps that use a hardcoded protocol name are not affected. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Electronjs | Electron | < 38.8.6 | — |
| Electronjs | Electron | >= 39.0.0, < 39.8.1 | — |
| Electronjs | Electron | >= 40.0.0, < 40.8.1 | — |
| Electronjs | Electron | 41.0.0 | Alpha1 |
References
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
What is CVE-2026-34773?
How severe is CVE-2026-34773?
How do I fix CVE-2026-34773?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-34768Electron is a framework for writing cross-platform desktop a…7.8
- CVE-2026-34769Electron is a framework for writing cross-platform desktop a…8.8
- CVE-2026-3477The PZ Frontend Manager plugin for WordPress is vulnerable t…5.3
- CVE-2026-34770Electron is a framework for writing cross-platform desktop a…8.8
- CVE-2026-34771Electron is a framework for writing cross-platform desktop a…8.8
- CVE-2026-34772Electron is a framework for writing cross-platform desktop a…8.8
- CVE-2026-34774Electron is a framework for writing cross-platform desktop a…8.1
- CVE-2026-34775Electron is a framework for writing cross-platform desktop a…9.8
- CVE-2026-34776Electron is a framework for writing cross-platform desktop a…5.3
- CVE-2026-34777Electron is a framework for writing cross-platform desktop a…5.4
- CVE-2026-34778Electron is a framework for writing cross-platform desktop a…6.5
- CVE-2026-34779Electron is a framework for writing cross-platform desktop a…7.8
Are you affected by CVE-2026-34773?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST