{"id":"CVE-2020-4076","aliases":["EUVD-2020-0565","GHSA-m93v-9qjc-3g79"],"status":"published","title":"Context isolation bypass via leaked cross-context objects in Electron","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 contextIsolation are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00367,"percentile":0.30788,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-501"],"published":"2020-07-07T00:01:07Z","modified":"2026-10-20T10:54:21Z","fixes":[{"ecosystem":"npm","package":"electron","fixed_in":["8.2.4","7.2.4"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"electron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"8.0.0"},{"fixed":"8.2.4"}]}]},{"source":"ghsa","ecosystem":"npm","package":"electron","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"7.2.4"}]}]},{"source":"osv","ecosystem":"npm","package":"electron","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"7.2.4"}]}]},{"source":"osv","ecosystem":"npm","package":"electron","ranges":[{"type":"SEMVER","events":[{"introduced":"8.0.0"},{"fixed":"8.2.4"}]}]}],"products":[{"vendor":"electron","product":"electron"},{"vendor":"electronjs","product":"electron"}],"references":[{"url":"https://www.electronjs.org/releases/stable?page=3#release-notes-for-v824","tags":["x_refsource_MISC","x_transferred","Release Notes","Vendor Advisory","advisory","web"]},{"url":"https://github.com/electron/electron/security/advisories/GHSA-m93v-9qjc-3g79","tags":["x_refsource_CONFIRM","x_transferred","Third Party Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-4076","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-m93v-9qjc-3g79"}],"sources":{"cve":[{"id":"CVE-2020-4076","title":"Context isolation bypass via leaked cross-context objects in Electron","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 contextIsolation are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.","status":"published","published":"2020-07-07T00:05:21Z","modified":"2024-08-04T07:52:20.967Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"cna"}],"cwes":["CWE-501"],"updated_at":"2026-11-02T14:35:55.797746Z"}],"euvd":[{"id":"EUVD-2020-0565","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 contextIsolation are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.","status":"published","published":"2020-07-07T00:05:21Z","modified":"2024-08-04T07:52:20Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-03T03:08:08.458165Z"}],"ghsa":[{"id":"GHSA-m93v-9qjc-3g79","title":"Context isolation bypass via leaked cross-context objects in Electron","description":"### Impact\nApps using `contextIsolation` are affected.\n\nThis is a context isolation bypass, meaning that code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions.\n\n### Workarounds\nThere are no app-side workarounds, you must update your Electron version to be protected.\n\n### Fixed Versions\n* `9.0.0-beta.21`\n* `8.2.4`\n* `7.2.4`\n\n### Non-Impacted Versions\n* `9.0.0-beta.*`\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [security@electronjs.org](mailto:security@electronjs.org)","status":"published","published":"2020-07-07T00:01:07Z","modified":"2023-01-09T05:03:41Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-501"],"updated_at":"2026-11-02T14:36:05.705235Z"}],"nvd":[{"id":"CVE-2020-4076","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 contextIsolation are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.","status":"published","published":"2020-07-07T00:15:10.59Z","modified":"2026-06-17T03:19:31.59Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical","assessor":"primary"},{"version":"2.0","score":3.6,"vector":"AV:L/AC:L/Au:N/C:P/I:P/A:N","level":"low","assessor":"primary"}],"cwes":["CWE-501"],"updated_at":"2026-11-02T14:06:08.145904Z"}],"osv":[{"id":"CVE-2020-4076","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 contextIsolation are affected. This is fixed in versions 9.0.0-beta.21, 8.2.4 and 7.2.4.","status":"published","published":"2020-07-07T00:15:10.59Z","modified":"2026-10-20T10:54:21.886000609Z","cvss":[{"version":"3.1","score":9,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"critical"}],"updated_at":"2026-11-02T15:44:16.936975Z"},{"id":"GHSA-m93v-9qjc-3g79","title":"Context isolation bypass via leaked cross-context objects in Electron","description":"### Impact\nApps using `contextIsolation` are affected.\n\nThis is a context isolation bypass, meaning that code running in the main world context in the renderer can reach into the isolated Electron context and perform privileged actions.\n\n### Workarounds\nThere are no app-side workarounds, you must update your Electron version to be protected.\n\n### Fixed Versions\n* `9.0.0-beta.21`\n* `8.2.4`\n* `7.2.4`\n\n### Non-Impacted Versions\n* `9.0.0-beta.*`\n\n### For more information\nIf you have any questions or comments about this advisory:\n* Email us at [security@electronjs.org](mailto:security@electronjs.org)","status":"published","published":"2020-07-07T00:01:07Z","modified":"2026-07-08T06:29:58.496729022Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-501"],"updated_at":"2026-11-02T15:46:51.463834Z"}]}}