{"cve":"CVE-2026-34771","nvd":{"published":"2026-04-04T00:16:17.980","modified":"2026-07-24T22:10:00.140","status":"Modified","description":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8, apps that register an asynchronous session.setPermissionRequestHandler() may be vulnerable to a use-after-free when handling fullscreen, pointer-lock, or keyboard-lock permission requests. If the requesting frame navigates or the window closes while the permission handler is pending, invoking the stored callback dereferences freed memory, which may lead to a crash or memory corruption. Apps that do not set a permission request handler, or whose handler responds synchronously, are not affected. This issue has been patched in versions 38.8.6, 39.8.0, 40.7.0, and 41.0.0-beta.8.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-416","CWE-364"],"references":["https://github.com/electron/electron/security/advisories/GHSA-8337-3p73-46f4","https://access.redhat.com/security/cve/CVE-2026-34771","https://bugzilla.redhat.com/show_bug.cgi?id=2454995","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34771.json"],"products":["electronjs:electron"],"source":"nvd","synced_at":"2026-10-19T22:28:59.047572785+00:00"},"epss":{"cve":"CVE-2026-34771","score":0.00292,"percentile":0.21841,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-8337-3p73-46f4","url":"https://osv.dev/vulnerability/GHSA-8337-3p73-46f4","summary":"Electron: Use-after-free in WebContents fullscreen, pointer-lock, and keyboard-lock permission callbacks","modified":"2026-04-06T23:18:52.586490Z","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 <39.8.0"],"fixed":["39.8.0"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=40.0.0-alpha.1 <40.7.0"],"fixed":["40.7.0"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=41.0.0-alpha.1 <41.0.0-beta.8"],"fixed":["41.0.0-beta.8"]}]}],"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."]}