Security advisory

{
  "id": "73f6fad03c2479c7e2f940c677f35334948833d6dc64670f8dc1f3950c5806d8",
  "url": "https://osv.dev/vulnerability/CVE-2020-7770",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-7770",
    "summary": "This affects the package json8 before 1.0.3. The function adds in the target object the property specified in the path, however it does not properly check the key being set, leading to a prototype pollution.",
    "evidence": "osv:CVE-2020-7770",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2020-7770",
      "aliases": [
        "CVE-2020-7770",
        "GHSA-7h43-gx24-p529",
        "SNYK-JS-JSON8-1017116"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/sonnyp/json8",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "e069491061f23cebbba0c0e9709d1923335433d7"
                },
                {
                  "fixed": "2e890261b66cbc54ae01d0c79c71b0fd18379e7e"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:json8_project:json8:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.0.3"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "2e890261b66cbc54ae01d0c79c71b0fd18379e7e"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v1.0.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-7770.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:24.464810366Z",
      "provider": "osv",
      "references": [
        "https://github.com/sonnyp/JSON8/commit/2e890261b66cbc54ae01d0c79c71b0fd18379e7e",
        "https://snyk.io/vuln/SNYK-JS-JSON8-1017116"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-7770",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 385304,
  "published_at": "2020-11-12T11:15:11.87+00:00"
}