{"id":"CVE-2026-102677","state":"PUBLISHED","title":"Electron: Sandboxed preload code cache can be poisoned by a compromised renderer","description":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. 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.","publishedAt":"2026-09-29T17:43:26.960Z","updatedAt":"2026-10-02T12:18:18.477Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["electron electron"],"affected":[{"vendor":"electron","product":"electron","versions":[{"version":">= 42.3.3, < 42.10.0","status":"affected"},{"version":">= 43.0.0-beta.1, < 43.5.0","status":"affected"},{"version":">= 44.0.0-alpha.1, < 44.0.0-beta.6","status":"affected"}]}],"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/25ba8be57c65a83d8c14ebb8aa37693df17a04f3","https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217","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"],"weaknesses":["CWE-20","CWE-345"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102677.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102677","state":"PUBLISHED","datePublished":"2026-09-29T17:43:26.960Z","dateUpdated":"2026-10-02T12:18:18.477Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-09-29T16:10:04.075Z"},"containers":{"cna":{"title":"Electron: Sandboxed preload code cache can be poisoned by a compromised renderer","descriptions":[{"lang":"en","value":"Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. 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."}],"affected":[{"vendor":"electron","product":"electron","versions":[{"version":">= 42.3.3, < 42.10.0","status":"affected"},{"version":">= 43.0.0-beta.1, < 43.5.0","status":"affected"},{"version":">= 44.0.0-alpha.1, < 44.0.0-beta.6","status":"affected"}]}],"references":[{"url":"https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq","name":"https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/electron/electron/pull/52480","name":"https://github.com/electron/electron/pull/52480","tags":["x_refsource_MISC"]},{"url":"https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601","name":"https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601","tags":["x_refsource_MISC"]},{"url":"https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3","name":"https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3","tags":["x_refsource_MISC"]},{"url":"https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217","name":"https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217","tags":["x_refsource_MISC"]},{"url":"https://github.com/electron/electron/releases/tag/v42.10.0","name":"https://github.com/electron/electron/releases/tag/v42.10.0","tags":["x_refsource_MISC"]},{"url":"https://github.com/electron/electron/releases/tag/v43.5.0","name":"https://github.com/electron/electron/releases/tag/v43.5.0","tags":["x_refsource_MISC"]},{"url":"https://github.com/electron/electron/releases/tag/v44.0.0-beta.6","name":"https://github.com/electron/electron/releases/tag/v44.0.0-beta.6","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-20","lang":"en","description":"CWE-20: Improper Input Validation","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-345","lang":"en","description":"CWE-345: Insufficient Verification of Data Authenticity","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-09-29T17:43:26.960Z"},"source":{"advisory":"GHSA-qmv3-fv6v-rmhq","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-02T12:18:07.959498Z","id":"CVE-2026-102677","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-02T12:18:18.477Z"}}]}}}