Security advisory

{
  "id": "5288aa920e66989959368b98598ca6fd6e4d85cb1b4a9998c2d2bffdfa927c99",
  "url": "https://osv.dev/vulnerability/CVE-2020-12079",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-12079",
    "summary": "Beaker before 0.8.9 allows a sandbox escape, enabling system access and code execution. This occurs because Electron context isolation is not used, and therefore an attacker can conduct a prototype-pollution attack against the Electron internal messaging API.",
    "evidence": "osv:CVE-2020-12079",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-12079",
      "aliases": [
        "CVE-2020-12079"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/beakerbrowser/beaker",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "33e79cc09fe40e1b9d60b96c77f5b52c80c6c0a0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:beakerbrowser:beaker:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "0.8.9"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "33e79cc09fe40e1b9d60b96c77f5b52c80c6c0a0"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "0.8.9"
                  }
                ]
              }
            }
          ],
          "versions": [
            "0.8.8",
            "0.8.7",
            "0.8.6",
            "0.8.5",
            "0.8.4",
            "0.8.3",
            "0.8.2",
            "0.8.1",
            "0.8.0",
            "0.8.0-prerelease.9",
            "0.8.0-prerelease.8",
            "0.8.0-prerelease.7",
            "0.8.0-prerelease.6",
            "0.8.0-prerelease.5",
            "0.8.0-prerelease.4",
            "0.8.0-prerelease.2",
            "0.8.0-prerelease.1",
            "0.7.11",
            "0.7.10",
            "0.7.9",
            "0.7.8",
            "0.7.8-prerelease.2",
            "0.7.8-prerelease.1",
            "buildtest",
            "0.7.7",
            "0.7.6",
            "0.7.5",
            "0.7.3",
            "0.7.2",
            "0.7.1",
            "0.7.0",
            "0.6.1",
            "0.6.0",
            "0.5.2",
            "0.5.1",
            "0.5.0",
            "0.4.2",
            "0.4.1",
            "0.4.0",
            "0.3.7",
            "0.3.2",
            "0.3.1",
            "0.3.0",
            "0.2.0",
            "in-browser-plugins-installer",
            "0.1.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-12079.json"
          }
        }
      ],
      "modified": "2026-10-20T10:52:47.037440625Z",
      "provider": "osv",
      "references": [
        "https://github.com/beakerbrowser/beaker/issues/1519",
        "https://github.com/beakerbrowser/beaker/releases/tag/0.8.9"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-12079",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 383817,
  "published_at": "2020-04-23T04:15:13.343+00:00"
}