Electron: Sandboxed preload code cache can be poisoned by a compromised renderer

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-102677",
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "dateUpdated": "2026-09-29T17:43:26.960Z",
    "dateReserved": "2026-09-29T16:10:04.075Z",
    "datePublished": "2026-09-29T17:43:26.960Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M",
        "dateUpdated": "2026-09-29T17:43:26.960Z"
      },
      "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"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-20: Improper Input Validation",
              "cweId": "CWE-20",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "CWE-345: Insufficient Verification of Data Authenticity",
              "cweId": "CWE-345",
              "type": "CWE"
            }
          ]
        }
      ],
      "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": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "attackVector": "LOCAL",
            "attackComplexity": "HIGH",
            "privilegesRequired": "LOW",
            "userInteraction": "NONE",
            "scope": "CHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH"
          }
        }
      ]
    }
  }
}