react18-use was vulnerable to malicious code execution via compromised commits

{
  "id": "5a7da780a786f16707b780ad8d3e9c0d89494d160be0c4cd0c278339dd23077d",
  "url": "https://osv.dev/vulnerability/CVE-2026-48161",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "react18-use was vulnerable to malicious code execution via compromised commits",
    "summary": "react18-use is a React 19 use hook shim. Between 2026-05-19 01:07:01 and 2026-05-19 15:20:43, the default branch contained malicious commits 7b79148d1495a2505f9277da295a98cf176f4496 through 7b79148d1495a2505f9277da295a98cf176f4496 that executed remote attacker-controlled code on developer machines during `npm install`. The commits were removed by force-push, but local clones, forks, and direct-SHA URLs may still contain them, and `npm install` against an affected checkout will still execute the code today. The package was not published to npm. `src/install.js` was added and wired into the `postinstall` script. It fetched a JavaScript payload from an attacker-controlled HTTPS endpoint (configurable via an environment variable), disabled TLS verification, and evaluated the response as code with `require` available. Execution was deliberately skipped on CI and cloud/serverless environments, targeting developer workstations. The second-stage payload was attacker-hosted and cannot be reconstructed. Assume full compromise of anything reachable from a Node process with the user's permissions. Those who ran `npm install` against an affected checkout on a developer machine on or after 2026-05-19 01:07:01 should treat the machine as compromised, rotate every credential the machine could reach, audit account activity since 2026-05-19 01:07:01, and clean local clones.",
    "evidence": "osv:CVE-2026-48161",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2026-48161",
      "aliases": [
        "CVE-2026-48161",
        "GHSA-32xh-vg5f-64fm"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/dai-shi/react18-use",
              "type": "GIT",
              "events": [
                {
                  "introduced": "7b79148d1495a2505f9277da295a98cf176f4496"
                },
                {
                  "last_affected": "7b79148d1495a2505f9277da295a98cf176f4496"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "range": [
                      {
                        "introduced": "7b79148d1495a2505f9277da295a98cf176f4496"
                      },
                      {
                        "last_affected": "7b79148d1495a2505f9277da295a98cf176f4496"
                      }
                    ],
                    "source": "AFFECTED_FIELD",
                    "strategy": "StringRangeExpression"
                  }
                ]
              }
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48161.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:37.016350548Z",
      "provider": "osv",
      "references": [
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48161.json",
        "https://github.com/dai-shi/react18-use/security/advisories/GHSA-32xh-vg5f-64fm",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-48161"
      ],
      "provider_metadata": {
        "cwe_ids": [
          "CWE-506"
        ],
        "cna_assigner": "GitHub_M",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48161.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-48161",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 504423,
  "published_at": "2026-08-10T22:27:35.472+00:00"
}