{"id":"GHSA-ff2p-hmqr-hxm4","revision":"1615e3ee95d245dfa4076bbc31f46313","records":[{"revision":"1615e3ee95d245dfa4076bbc31f46313","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-ff2p-hmqr-hxm4","aliases":["CVE-2026-70610"],"title":"Electron: contextBridge object copy honors prototype setters","description":"### Impact\nObjects copied across the `contextBridge` boundary from untrusted content could carry an attacker-influenced prototype, enabling prototype-pollution-style attacks against preload code despite context isolation being enabled.\n\nApps are only affected if their preload code accepts object arguments from untrusted content and reads properties from them without own-property checks. Apps that only accept primitive arguments, or that validate object arguments, are not affected.\n\n### Workarounds\nValidate objects received from untrusted content with own-property checks (`Object.hasOwn`), or copy them onto a null-prototype object before use.\n\n### Fixed Versions\n* `42.0.0-beta.4`\n* `41.2.2`\n* `40.9.2`\n* `39.8.9`\n\n### For more information\nIf you have any questions or comments about this advisory, email Electron at [security@electronjs.org](mailto:security@electronjs.org)","state":0,"publishedAt":"2026-08-05T17:41:20+00:00","modifiedAt":"2026-08-05T17:56:07.830265+00:00","affected":[{"ecosystem":"npm","name":"electron","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"39.8.9"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"electron","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"40.0.0-alpha.1"},{"kind":"fixed","version":"40.9.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"electron","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"41.0.0-alpha.1"},{"kind":"fixed","version":"41.2.2"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"electron","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"42.0.0-alpha.1"},{"kind":"fixed","version":"42.0.0-beta.4"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/electron/electron/security/advisories/GHSA-ff2p-hmqr-hxm4","https://github.com/electron/electron/pull/51083","https://github.com/electron/electron/pull/51084","https://github.com/electron/electron/pull/51085","https://github.com/electron/electron/pull/51086","https://github.com/electron/electron/commit/17d5d26499cd279fab48f5f26527f8edc02a7713","https://github.com/electron/electron/commit/23a6efb714dec80e2cf45d3054d18d701162e4dd","https://github.com/electron/electron/commit/4ac50292d552fb510eb778392620c85308770a55","https://github.com/electron/electron/commit/5b699544cbbed51bedb7c60d75c8c42be5825737","https://github.com/electron/electron","https://github.com/electron/electron/releases/tag/v39.8.9","https://github.com/electron/electron/releases/tag/v40.9.2","https://github.com/electron/electron/releases/tag/v41.2.2","https://github.com/electron/electron/releases/tag/v42.0.0-beta.4"],"sourceUrl":"https://github.com/advisories/GHSA-ff2p-hmqr-hxm4","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-ff2p-hmqr-hxm4","identifiers":["GHSA-ff2p-hmqr-hxm4","CVE-2026-70610"]},"retained":false,"historicalAffected":[]}],"coverage":[]}