{"cve":"CVE-2026-34777","nvd":{"published":"2026-04-04T00:16:18.907","modified":"2026-07-24T22:10:00.140","status":"Analyzed","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, when an iframe requests fullscreen, pointerLock, keyboardLock, openExternal, or media permissions, the origin passed to session.setPermissionRequestHandler() was the top-level page's origin rather than the requesting iframe's origin. Apps that grant permissions based on the origin parameter or webContents.getURL() may inadvertently grant permissions to embedded third-party content. The correct requesting URL remains available via details.requestingUrl. Apps that already check details.requestingUrl are not affected. This issue has been patched in versions 38.8.6, 39.8.1, 40.8.1, and 41.0.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N","score":5.4},"cwes":["CWE-346"],"references":["https://github.com/electron/electron/security/advisories/GHSA-r5p7-gp4j-qhrx"],"products":["electronjs:electron"],"source":"nvd","synced_at":"2026-10-19T22:28:59.047572785+00:00"},"epss":{"cve":"CVE-2026-34777","score":0.00124,"percentile":0.02096,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-r5p7-gp4j-qhrx","url":"https://osv.dev/vulnerability/GHSA-r5p7-gp4j-qhrx","summary":"Electron: Incorrect origin passed to permission request handler for iframe requests","modified":"2026-04-06T23:18:50.776701Z","packages":[{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":["<38.8.6"],"fixed":["38.8.6"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=39.0.0-alpha.1 <39.8.1"],"fixed":["39.8.1"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=40.0.0-alpha.1 <40.8.1"],"fixed":["40.8.1"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=41.0.0-alpha.1 <41.0.0"],"fixed":["41.0.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}