{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.33.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@metamask/sdk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.16.0"
            },
            {
              "fixed": "0.33.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.33.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@metamask/sdk-react"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.16.0"
            },
            {
              "fixed": "0.33.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 0.33.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@metamask/sdk-communication-layer"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0.16.0"
            },
            {
              "fixed": "0.33.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [],
  "database_specific": {
    "cwe_ids": [
      "CWE-506"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-09-15T13:55:56Z",
    "nvd_published_at": null,
    "severity": "MODERATE"
  },
  "details": "### Who is affected?\nThis advisory only applies to developers who use MetaMask SDK in the browser and who, on Sept 8th 2025 between 13:00\u201315:30 UTC, performed one of the following actions and then deployed their application:\n- Installed MetaMask SDK into a project with a lockfile for the first time\n- Installed MetaMask SDK in a project without a lockfile\n- Updated a lockfile to pull in `debug@4.4.2` (e.g., via `npm update` or `yarn upgrade`)\n\n### What happened?\nOn Sept 8th, 2025 (13:00\u201315:30 UTC), a malicious version of the `debug` package (v4.4.2) was published to npm. The injected code attempts to interfere with dApp-to-wallet communication when executed in a browser context. \n\nWhile MetaMask SDK itself was not directly impacted, projects installing the SDK during this window may have inadvertently pulled in the malicious version of `debug`.\n\n### Mitigation\n- If your application was rebuilt and redeployed after Sept 8th, 2025, 15:30 UTC, the malicious version of debug should no longer be present. Please also verify that your package manager (npm, yarn, pnpm, etc.) is not caching `debug@4.4.2`.\n- If you have not yet deployed since performing one of the actions above, delete your `node_modules` and reinstall dependencies before deploying.\n- If your application was deployed during the attack window and has not been rebuilt since, perform a clean install of dependencies and redeploy to ensure the malicious package is removed.\n\n### Resources\n[GitHub Advisory for debug](https://github.com/advisories/GHSA-8mgj-vmr8-frr6)",
  "id": "GHSA-qj3p-xc97-xw74",
  "modified": "2025-09-15T13:55:56Z",
  "published": "2025-09-15T13:55:56Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/MetaMask/metamask-sdk/security/advisories/GHSA-qj3p-xc97-xw74"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MetaMask/metamask-sdk/pull/1342"
    },
    {
      "type": "WEB",
      "url": "https://github.com/MetaMask/metamask-sdk/commit/baa185c6cfa97755a3d389d956372ad9eb37c4a4"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/MetaMask/metamask-sdk"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [],
  "summary": "MetaMask SDK indirectly exposed via malicious debug@4.4.2 dependency"
}