{"cve":"CVE-2020-4077","nvd":{"published":"2020-07-07T00:15:10.700","modified":"2026-06-17T03:19:31.783","status":"Modified","description":"In Electron before versions 7.2.4, 8.2.4, and 9.0.0-beta21, there is a context isolation bypass. Code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions. Apps using both `contextIsolation` and `contextBridge` are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":9.9},"cwes":["CWE-501"],"references":["https://github.com/electron/electron/security/advisories/GHSA-h9jc-284h-533g","https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824","https://github.com/electron/electron/security/advisories/GHSA-h9jc-284h-533g","https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824"],"products":["electronjs:electron"],"source":"nvd","synced_at":"2026-10-19T21:06:22.076270124+00:00"},"epss":{"cve":"CVE-2020-4077","score":0.01003,"percentile":0.62955,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-h9jc-284h-533g","url":"https://osv.dev/vulnerability/GHSA-h9jc-284h-533g","summary":"Context isolation bypass via contextBridge in Electron","modified":"2026-07-08T06:29:45.073170767Z","packages":[{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":["<7.2.4"],"fixed":["7.2.4"]},{"ecosystem":"npm","name":"electron","purl":"pkg:npm/electron","ranges":[">=8.0.0 <8.2.4"],"fixed":["8.2.4"]}]}],"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."]}