{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0.3.6"
              },
              {
                "fixed": "0.3.10"
              },
              {
                "introduced": "0.4.0"
              },
              {
                "fixed": "0.4.7"
              },
              {
                "introduced": "0.5.0"
              },
              {
                "fixed": "0.5.3"
              },
              {
                "introduced": "0.6.0"
              },
              {
                "fixed": "0.6.12"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "5eab662f486e423e8d1d4bde65c47f99243aa1fe"
            },
            {
              "fixed": "4ba48a1091e18c270faa53587d0fa8366167c554"
            },
            {
              "introduced": "44e731b972b864b1de1ef315bf1ce4dbba3a7d67"
            },
            {
              "fixed": "6a7a19ef57847b98b4ad3ab4195dd35321c39d8f"
            },
            {
              "introduced": "96d9e2564fc0f1413a7a1371cfd9cc5600896771"
            },
            {
              "fixed": "e8017b7d7b88e737b143d6c74a0509fbf7728982"
            },
            {
              "introduced": "aeebf1466c2b7b5660545cc4365b0a66bc54a765"
            },
            {
              "fixed": "2f22287016dabb8e9fd6b84db9834a80cdfb9cdd"
            }
          ],
          "repo": "https://github.com/ljharb/js-traverse",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-rj28-8w7x-jmqc"
  ],
  "database_specific": {
    "cna_assigner": "harborist",
    "cwe_ids": [
      "CWE-1321"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107353.json"
  },
  "details": "traverse (npm) versions 0.3.6 through 0.3.9, 0.4.0 through 0.4.6, 0.5.0 through 0.5.2, and 0.6.0 through 0.6.11 allow prototype pollution through set(). When the path passed to set() crosses a primitive value, the next path segment is resolved on that primitive's built-in prototype, so an application that passes an untrusted path to set() lets an attacker add or overwrite properties of String.prototype, Number.prototype, or Boolean.prototype using plain JSON data, for example traverse({ name: 'bob' }).set(['name', '__proto__', 'polluted'], 'yes'). Object.prototype was reachable only with a non-data path segment, such as an object whose toString returns a different value on each call, or through a Proxy that accepts an assignment without storing it. This is fixed in 0.3.10, 0.4.7, 0.5.3, and 0.6.12.",
  "id": "CVE-2026-107353",
  "modified": "2026-10-09T02:31:00.730690679Z",
  "published": "2026-10-07T19:35:15.351Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://www.npmjs.com"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107353.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/ljharb/js-traverse/security/advisories/GHSA-rj28-8w7x-jmqc"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107353"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ljharb/js-traverse/commit/37a9ebd103d2a259c824c29cdcc3f0dfe1acffce"
    },
    {
      "type": "FIX",
      "url": "https://github.com/ljharb/js-traverse/commit/81ccab43e379cf42eb2a5f689630f7f79b3d71b8"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/ljharb/js-traverse"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "traverse: set() can write to built-in prototypes via an untrusted path"
}