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From 42.3.3 until 42.10.0, 43.5.0, and 44.0.0-beta.6, Electron's sandboxed preload code cache did not verify that a cached entry matched the preload it was served for. A compromised renderer could write attacker-controlled cache data and cause Electron to reuse it for a later load, executing the renderer's code in the more privileged preload context. The issue affects applications that load untrusted content. This issue is fixed in versions 42.10.0, 43.5.0, and 44.0.0-beta.6.","state":0,"publishedAt":"2026-09-29T18:17:09.573+00:00","modifiedAt":"2026-10-08T20:24:30.737+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","score":7.8,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H","score":8.8,"severity":"HIGH"}],"references":["https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601","https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3","https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217","https://github.com/electron/electron/pull/52480","https://github.com/electron/electron/releases/tag/v42.10.0","https://github.com/electron/electron/releases/tag/v43.5.0","https://github.com/electron/electron/releases/tag/v44.0.0-beta.6","https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102677","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-20","CWE-345"],"productCriteria":["cpe:2.3:a:electronjs:electron:*:*:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:alpha1:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:alpha2:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:alpha3:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:alpha4:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:alpha5:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:alpha6:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:alpha7:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:alpha8:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:alpha9:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:beta1:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:beta2:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:beta3:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:beta4:*:*:*:node.js:*:*","cpe:2.3:a:electronjs:electron:44.0.0:beta5:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-09-29T18:17:09.573","lastModified":"2026-10-08T20:24:30.737"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-102677","identifiers":["CVE-2026-102677"]},"retained":false,"historicalAffected":[]},{"revision":"91b73e762f62461289e099eccace409e","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-qmv3-fv6v-rmhq","aliases":["CVE-2026-102677"],"title":"Electron: Sandboxed preload code cache can be poisoned by a compromised renderer","description":"### Impact\n\nThe cache Electron keeps for sandboxed preload scripts did not verify that a cached entry matched the preload it was served for. A compromised renderer could use this to run its own code in the preload context on a later load.\n\nApps are only affected if they load untrusted content. Apps that do not load untrusted content are not affected.\n\n### Workarounds\n\nThere are no app side workarounds, you must update to a patched version of Electron.\n\n### Fixed Versions\n\n* `44.0.0-beta.6`\n* `43.5.0 `\n* `42.10.0`\n\n### For more information\n\nIf you have any questions or comments about this advisory, email us at [security@electronjs.org](mailto:security@electronjs.org)","state":0,"publishedAt":"2026-09-29T18:02:01+00:00","modifiedAt":"2026-09-29T18:15:05.5719191+00:00","affected":[{"ecosystem":"npm","name":"electron","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"42.3.3"},{"kind":"fixed","version":"42.10.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"electron","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"43.0.0-beta.1"},{"kind":"fixed","version":"43.5.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"electron","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"44.0.0-alpha.1"},{"kind":"fixed","version":"44.0.0-beta.6"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq","https://github.com/electron/electron/pull/52480","https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601","https://github.com/electron/electron/commit/06a12a87a23f40abbf580fc7a552bc1189812c45","https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3","https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217","https://github.com/electron/electron","https://github.com/electron/electron/releases/tag/v42.10.0","https://github.com/electron/electron/releases/tag/v43.5.0","https://github.com/electron/electron/releases/tag/v44.0.0-beta.6"],"sourceUrl":"https://github.com/advisories/GHSA-qmv3-fv6v-rmhq","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-qmv3-fv6v-rmhq","identifiers":["GHSA-qmv3-fv6v-rmhq","CVE-2026-102677"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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