{"id":"CVE-2020-4077","aliases":["GHSA-h9jc-284h-533g"],"url":"https://o3.security/vulnerability/CVE-2020-4077","summary":"Context isolation bypass via contextBridge in Electron","details":"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.","published":"2020-07-07T00:15:10.700Z","modified":"2026-08-07T11:30:59.967073773Z","cvss":{"score":9.9,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"npm","name":"electron","fixedVersion":"7.2.4"},{"ecosystem":"npm","name":"electron","fixedVersion":"8.2.4"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/electron/electron/security/advisories/GHSA-h9jc-284h-533g"},{"type":"ADVISORY","url":"https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-07T11:30:59.967073773Z"}}