CVE catalog
CVE-2026-34777
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, when an iframe requests fullscreen, pointe
- Severity
- Medium · CVSS 5.4
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.12% · Oct 25, 2026
A flaw was found in Electron, a framework for building desktop applications. When an embedded iframe requests permissions, such as for fullscreen or media access, the framework incorrectly provides the origin of the main page instead of the requesting iframe's origin. This vulnerability allows a remote attacker, through malicious embedded content, to potentially gain unauthorized permissions. This could lead to unintended information disclosure or other unauthorized actions by the third-party content within the application. The correct requesting URL remains available via details.requestingUrl. Apps that already check details.requestingUrl are not affected. Electron: Electron: Unauthorized permission granting and information disclosure via incorrect iframe origin The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | electron | Not reported | 38.8.6 | fixed |
| Cpe | electron | Not reported | 39.8.1 | fixed |
| Cpe | electron | Not reported | 40.8.1 | fixed |
| Cpe | electron | Not reported | Not reported | unknown |
| Npm | electron | Not reported | 38.8.6 | fixed |
| Npm | electron | Not reported | 39.8.1 | fixed |
| Npm | electron | Not reported | 40.8.1 | fixed |
| Npm | electron | Not reported | 41.0.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | electron | cpe | Not reported | 38.8.6 | Not reported | Not reported | Not reported |
| Cpe | electron | cpe | Not reported | 39.8.1 | Not reported | Not reported | Not reported |
| Cpe | electron | cpe | Not reported | 40.8.1 | Not reported | Not reported | Not reported |
| Npm | electron | npm | Not reported | 38.8.6 | Not reported | Not reported | Not reported |
| Npm | electron | npm | Not reported | 39.8.1 | Not reported | Not reported | Not reported |
| Npm | electron | npm | Not reported | 40.8.1 | Not reported | Not reported | Not reported |
| Npm | electron | npm | Not reported | 41.0.0 | Not reported | Not reported | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [https://nvd.nist.gov/vuln/detail/CVE-2026-34777]
- [https://osv.dev/vulnerability/GHSA-r5p7-gp4j-qhrx]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34777.json]
[FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]