{"id":"GHSA-qj3p-xc97-xw74","summary":"MetaMask SDK indirectly exposed via malicious debug@4.4.2 dependency","details":"### Who is affected?\nThis advisory only applies to developers who use MetaMask SDK in the browser and who, on Sept 8th 2025 between 13:00–15:30 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 (13:00–15:30 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)","modified":"2025-09-15T13:55:56Z","published":"2025-09-15T13:55:56Z","database_specific":{"nvd_published_at":null,"cwe_ids":["CWE-506"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"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"}],"affected":[{"package":{"name":"@metamask/sdk","ecosystem":"npm","purl":"pkg:npm/%40metamask/sdk"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.16.0"},{"fixed":"0.33.1"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 0.33.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/09/GHSA-qj3p-xc97-xw74/GHSA-qj3p-xc97-xw74.json"}},{"package":{"name":"@metamask/sdk-react","ecosystem":"npm","purl":"pkg:npm/%40metamask/sdk-react"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.16.0"},{"fixed":"0.33.1"}]}],"database_specific":{"last_known_affected_version_range":"\u003c= 0.33.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/09/GHSA-qj3p-xc97-xw74/GHSA-qj3p-xc97-xw74.json"}},{"package":{"name":"@metamask/sdk-communication-layer","ecosystem":"npm","purl":"pkg:npm/%40metamask/sdk-communication-layer"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0.16.0"},{"fixed":"0.33.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2025/09/GHSA-qj3p-xc97-xw74/GHSA-qj3p-xc97-xw74.json","last_known_affected_version_range":"\u003c= 0.33.0"}}],"schema_version":"1.9.0"}