CVE-2026-34780Electron: Context Isolation bypass via contextBridge VideoFrame transfer
Updated under an hour ago ()
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It affects electron and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. From versions 39.0.0-alpha.1 to before 39.8.0, 40.0.0-alpha.1 to before 40.7.0, and 41.0.0-alpha.1 to before 41.0.0-beta.8, apps that pass VideoFrame objects (from the WebCodecs API) across the contextBridge are vulnerable to a context isolation bypass. An attacker who can execute JavaScript in the main world (for example, via XSS) can use a bridged VideoFrame to gain access to the isolated world, including any Node.js APIs exposed to the preload script. Apps are only affected if a preload script returns, resolves, or passes a VideoFrame object to the main world via contextBridge.exposeInMainWorld(). Apps that do not bridge VideoFrame objects are not affected. This issue has been patched in versions 39.8.0, 40.7.0, and 41.0.0-beta.8.
- CVSS
- 8.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H
- Weakness (CWE)
- CWE-668, CWE-1188, CWE-501
- 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
- Modified
- Record last updated
- Jul 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
electron electron electron:electron (from the name) | from 39.0.0-alpha.1, < 39.8.0; from 40.0.0-alpha.1, < 40.7.0; from 41.0.0-alpha.1, < 41.0.0-beta.8 | CNA record |
Red Hat Red Hat Build of Podman Desktop redhat:podman_desktop | 1 | CISA ADP |
electronjs electron electronjs:electron | from 39.0.0 before 39.8.0; from 40.0.0 before 40.7.0; 41.0.0; 41.0.0; 41.0.0; 41.0.0; 41.0.0; 41.0.0; and 7 more ranges | NVD |
References
- https://github.com/electron/electron/security/advisories/GHSA-jfqg-hf23-qpw2x-refsource-confirm, vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-34780
- https://bugzilla.redhat.com/show_bug.cgi?id=2455020
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34780.json
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.