{"id":"CVE-2026-34780","aliases":["GHSA-jfqg-hf23-qpw2"],"url":"https://o3.security/vulnerability/CVE-2026-34780","summary":"Electron: Context Isolation bypass via contextBridge VideoFrame transfer","details":"### Impact\nApps 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.\n\nApps 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.\n\n### Workarounds\nDo not pass `VideoFrame` objects across `contextBridge`. If an app needs to transfer video frame data, serialize it to an `ArrayBuffer` or `ImageBitmap` before bridging.\n\n### Fixed Versions\n* `41.0.0-beta.8`\n* `40.7.0`\n* `39.8.0`\n\n### For more information\nIf there are any questions or comments about this advisory, please email [security@electronjs.org](mailto:security@electronjs.org)","published":"2026-04-04T00:02:02.224Z","modified":"2026-08-12T16:23:48.497984Z","cvss":{"score":8.3,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"electron","fixedVersion":"39.8.0"},{"ecosystem":"npm","name":"electron","fixedVersion":"40.7.0"},{"ecosystem":"npm","name":"electron","fixedVersion":"41.0.0-beta.8"}],"fix":null,"references":[{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34780.json"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-34780"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/34xxx/CVE-2026-34780.json"},{"type":"ADVISORY","url":"https://github.com/electron/electron/security/advisories/GHSA-jfqg-hf23-qpw2"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-34780"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2455020"},{"type":"PACKAGE","url":"https://github.com/electron/electron"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T16:23:48.497984Z"}}