CVE-2026-102677 (GCVE-0-2026-102677)

Vulnerability from cvelistv5 – Published: 2026-09-29 17:43 – Updated: 2026-09-29 17:43
VLAI
Title
Electron: Sandboxed preload code cache can be poisoned by a compromised renderer
Summary
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.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H
CWE
  • CWE-20 - Improper Input Validation
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
References
Impacted products
Vendor Product Version CPE status
electron electron Affected: >= 42.3.3, < 42.10.0
Affected: >= 43.0.0-beta.1, < 43.5.0
Affected: >= 44.0.0-alpha.1, < 44.0.0-beta.6
guessed Create a notification for this product.
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "electron",
          "vendor": "electron",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 42.3.3, \u003c 42.10.0"
            },
            {
              "status": "affected",
              "version": "\u003e= 43.0.0-beta.1, \u003c 43.5.0"
            },
            {
              "status": "affected",
              "version": "\u003e= 44.0.0-alpha.1, \u003c 44.0.0-beta.6"
            }
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      ],
      "descriptions": [
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          "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\u0027s 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\u0027s 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."
        }
      ],
      "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": [
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          "descriptions": [
            {
              "cweId": "CWE-20",
              "description": "CWE-20: Improper Input Validation",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-345",
              "description": "CWE-345: Insufficient Verification of Data Authenticity",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-29T17:43:26.960Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq"
        },
        {
          "name": "https://github.com/electron/electron/pull/52480",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/electron/electron/pull/52480"
        },
        {
          "name": "https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601"
        },
        {
          "name": "https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3"
        },
        {
          "name": "https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217"
        },
        {
          "name": "https://github.com/electron/electron/releases/tag/v42.10.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/electron/electron/releases/tag/v42.10.0"
        },
        {
          "name": "https://github.com/electron/electron/releases/tag/v43.5.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/electron/electron/releases/tag/v43.5.0"
        },
        {
          "name": "https://github.com/electron/electron/releases/tag/v44.0.0-beta.6",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/electron/electron/releases/tag/v44.0.0-beta.6"
        }
      ],
      "source": {
        "advisory": "GHSA-qmv3-fv6v-rmhq",
        "discovery": "UNKNOWN"
      },
      "title": "Electron: Sandboxed preload code cache can be poisoned by a compromised renderer"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-102677",
    "datePublished": "2026-09-29T17:43:26.960Z",
    "dateReserved": "2026-09-29T16:10:04.075Z",
    "dateUpdated": "2026-09-29T17:43:26.960Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-102677",
      "date": "2026-10-01",
      "epss": "0.0009",
      "percentile": "0.0042"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "electron",
                "vendor": "electron",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 42.3.3, \u003c 42.10.0"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 43.0.0-beta.1, \u003c 43.5.0"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 44.0.0-alpha.1, \u003c 44.0.0-beta.6"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "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\u0027s 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\u0027s 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."
          }
        ],
        "id": "CVE-2026-102677",
        "lastModified": "2026-09-30T19:38:27.293",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "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"
              },
              "exploitabilityScore": 1.1,
              "impactScore": 6.0,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-09-29T18:17:09.573",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/electron/electron/commit/000453e399bd1dee5e86376cdd9ece5fc071e601"
          },
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            "url": "https://github.com/electron/electron/commit/25ba8be57c65a83d8c14ebb8aa37693df17a04f3"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/electron/electron/commit/c38d6fd68756f04647ea857bdb6a2abec332e217"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/electron/electron/pull/52480"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/electron/electron/releases/tag/v42.10.0"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/electron/electron/releases/tag/v43.5.0"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/electron/electron/releases/tag/v44.0.0-beta.6"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/electron/electron/security/advisories/GHSA-qmv3-fv6v-rmhq"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-20"
              },
              {
                "lang": "en",
                "value": "CWE-345"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-09-30T17:41:11+00:00",
      "cve": "CVE-2026-102677",
      "id": "CVE-2026-102677",
      "initial_release_date": "2026-09-29T17:43:26.960000+00:00",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "electron: Electron: Privilege escalation via sandboxed preload code cache poisoning",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-102677.json",
      "version": "3"
    }
  }
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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