GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-70599 (GCVE-0-2026-70599)

Vulnerability from cvelistv5 – Published: 2026-08-05 15:36 – Updated: 2026-08-05 18:41
VLAI
Title
Electron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe Origin
Summary
Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1, serial-port and media permission checks made from an iframe passed the top-level frame origin to session.setPermissionCheckHandler instead of the requesting iframe origin. Origin-based handler logic could grant a cross-origin iframe device access intended only for the top-level origin. This issue is fixed in 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1.
Severity
5.9 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 18:13 UTC
CWE
  • CWE-346 - Origin Validation Error
Assigner
References
Impacted products
Vendor Product Version CPE status
electron electron Affected: < 39.8.7
Affected: >= 40.0.0-alpha.1, < 40.9.0
Affected: >= 41.0.0-alpha.1, < 41.2.0
Affected: >= 42.0.0-alpha.1, < 42.0.0-beta.1
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-70599",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-05T18:13:54.699962Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-05T18:41:57.567Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "electron",
          "vendor": "electron",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 39.8.7"
            },
            {
              "status": "affected",
              "version": "\u003e= 40.0.0-alpha.1, \u003c 40.9.0"
            },
            {
              "status": "affected",
              "version": "\u003e= 41.0.0-alpha.1, \u003c 41.2.0"
            },
            {
              "status": "affected",
              "version": "\u003e= 42.0.0-alpha.1, \u003c 42.0.0-beta.1"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1, serial-port and media permission checks made from an iframe passed the top-level frame origin to session.setPermissionCheckHandler instead of the requesting iframe origin. Origin-based handler logic could grant a cross-origin iframe device access intended only for the top-level origin. This issue is fixed in 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-346",
              "description": "CWE-346: Origin Validation Error",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T15:36:02.182Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/electron/electron/security/advisories/GHSA-9pf5-hg6p-4pwp",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/electron/electron/security/advisories/GHSA-9pf5-hg6p-4pwp"
        },
        {
          "name": "https://github.com/electron/electron/commit/0cbdf2f0375466d701aa393c92e0ec29eb89ea6c",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/electron/electron/commit/0cbdf2f0375466d701aa393c92e0ec29eb89ea6c"
        }
      ],
      "source": {
        "advisory": "GHSA-9pf5-hg6p-4pwp",
        "discovery": "UNKNOWN"
      },
      "title": "Electron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe Origin"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-70599",
    "datePublished": "2026-08-05T15:36:02.182Z",
    "dateReserved": "2026-08-04T19:50:27.328Z",
    "dateUpdated": "2026-08-05T18:41:57.567Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-70599",
      "date": "2026-09-20",
      "epss": "0.00182",
      "percentile": "0.08027"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "electron",
                "vendor": "electron",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 39.8.7"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 40.0.0-alpha.1, \u003c 40.9.0"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 41.0.0-alpha.1, \u003c 41.2.0"
                  },
                  {
                    "status": "affected",
                    "version": "\u003e= 42.0.0-alpha.1, \u003c 42.0.0-beta.1"
                  }
                ]
              }
            ],
            "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. Prior to 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1, serial-port and media permission checks made from an iframe passed the top-level frame origin to session.setPermissionCheckHandler instead of the requesting iframe origin. Origin-based handler logic could grant a cross-origin iframe device access intended only for the top-level origin. This issue is fixed in 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1."
          }
        ],
        "id": "CVE-2026-70599",
        "lastModified": "2026-09-08T20:44:08.253",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                "version": "3.1"
              },
              "exploitabilityScore": 2.2,
              "impactScore": 3.6,
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2026-70599",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-05T18:13:54.699962Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2026-08-05T16:17:03.913",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/electron/electron/commit/0cbdf2f0375466d701aa393c92e0ec29eb89ea6c"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/electron/electron/security/advisories/GHSA-9pf5-hg6p-4pwp"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-346"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Secondary"
          }
        ]
      }
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "metrics": [
              {
                "other": {
                  "content": {
                    "id": "CVE-2026-70599",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2026-08-05T18:13:54.699962Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2026-08-05T18:13:55.872Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "product": "electron",
              "vendor": "electron",
              "versions": [
                {
                  "status": "affected",
                  "version": "\u003c 39.8.7"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 40.0.0-alpha.1, \u003c 40.9.0"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 41.0.0-alpha.1, \u003c 41.2.0"
                },
                {
                  "status": "affected",
                  "version": "\u003e= 42.0.0-alpha.1, \u003c 42.0.0-beta.1"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "Electron is a framework for writing cross-platform desktop applications using JavaScript, HTML and CSS. Prior to 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1, serial-port and media permission checks made from an iframe passed the top-level frame origin to session.setPermissionCheckHandler instead of the requesting iframe origin. Origin-based handler logic could grant a cross-origin iframe device access intended only for the top-level origin. This issue is fixed in 39.8.7, 40.9.0, 41.2.0, and 42.0.0-beta.1."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "attackComplexity": "HIGH",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.9,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
                "version": "3.1"
              }
            }
          ],
          "problemTypes": [
            {
              "descriptions": [
                {
                  "cweId": "CWE-346",
                  "description": "CWE-346: Origin Validation Error",
                  "lang": "en",
                  "type": "CWE"
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T15:36:02.182Z",
            "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
            "shortName": "GitHub_M"
          },
          "references": [
            {
              "name": "https://github.com/electron/electron/security/advisories/GHSA-9pf5-hg6p-4pwp",
              "tags": [
                "x_refsource_CONFIRM"
              ],
              "url": "https://github.com/electron/electron/security/advisories/GHSA-9pf5-hg6p-4pwp"
            },
            {
              "name": "https://github.com/electron/electron/commit/0cbdf2f0375466d701aa393c92e0ec29eb89ea6c",
              "tags": [
                "x_refsource_MISC"
              ],
              "url": "https://github.com/electron/electron/commit/0cbdf2f0375466d701aa393c92e0ec29eb89ea6c"
            }
          ],
          "source": {
            "advisory": "GHSA-9pf5-hg6p-4pwp",
            "discovery": "UNKNOWN"
          },
          "title": "Electron: Permission Check Handler Receives Main Frame Origin Instead of Requesting Iframe Origin"
        }
      },
      "cveMetadata": {
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-70599",
        "datePublished": "2026-08-05T15:36:02.182Z",
        "dateReserved": "2026-08-04T19:50:27.328Z",
        "dateUpdated": "2026-08-05T18:41:57.567Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • 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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.