{"id":"MAL-2026-18356","revision":null,"records":[{"revision":"ed380bfc864f4cca944d0dbbe55288b5","observedAt":"2026-10-29T14:12:32.841+00:00","statement":{"source":"osv","id":"MAL-2026-18356","aliases":[],"title":"Malicious code in @webapp-shared/login-vmok (npm)","description":"@webapp-shared/login-vmok is a dependency-confusion package: it uses the `@webapp-shared` scope, which matches a private internal package scope, and was published on 2026-10-27 in versions 1.0.0, 1.0.1, 1.1.0, 2.0.1, 3.0.0 and 99.0.1 so that builds resolving the internal name from the public registry install it instead. Its `postinstall` script runs `node beacon.cjs`, which sends an HTTP POST over cleartext HTTP to the hardcoded IP endpoint `http://13.140.137.222:8787/_ah/dc` with the package name, the machine's hostname, the install directory, the current working directory and the Node.js version; the entry point `index.js` sends the same request again whenever the package is loaded and otherwise has no functionality. The beacon code is the same as in other dependency-confusion packages sending to `http://185.158.107.175:8787/_ah/dc` (e.g. MAL-2026-18276), with only the endpoint and package name changed. The inert `0.0.0-stage` and `0.1.0` placeholder versions carry no install script and are not affected. Any machine that installed an affected version has disclosed its hostname and filesystem layout to a third party; remove the package, pin or scope internal package names to the internal registry, and block 13.140.137.222 on build hosts.\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (038927c39e3df3caeb1629368073886842fe7abed1413e3ac6d8a215c9cd68bf)\nThe package is a stub with no real functionality (described as a 'compatibility shim') under the scoped name @webapp-shared/ with implausibly high version 99.0.1 — the shape of a dependency-confusion squat. On install, package.json runs `node beacon.cjs` as a postinstall script, and the main entrypoint index.js calls `require('./beacon.cjs').fire()` on load, so the beacon fires both at `npm install` and on any require. beacon.cjs POSTs a JSON payload containing the package name, `os.hostname()`, `__dirname` install path, `process.cwd()`, and `process.version` to the hardcoded bare-IP cleartext HTTP endpoint http://13.140.137.222:8787/_ah/dc. index.js exports a Proxy no-op so consumer builds complete without errors, concealing that the module provides no functionality. The transmitted host identifiers disclose internal hostnames and filesystem paths of installers whose private-registry resolution was captured by the scoped squat, enabling targeted follow-on supply-chain attacks against those environments.\n","state":0,"publishedAt":"2026-10-27T17:08:01+00:00","modifiedAt":"2026-10-29T13:48:10.4989009+00:00","affected":[{"ecosystem":"npm","name":"@webapp-shared/login-vmok","ranges":[],"versions":["1.0.0","1.0.1","1.1.0","2.0.1","3.0.0","99.0.1"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/@webapp-shared/login-vmok","https://www.npmjs.com/package/@webapp-shared/login-vmok/v/99.0.1","https://www.npmjs.com/package/@webapp-shared/login-vmok/v/1.0.0","https://www.npmjs.com/package/@webapp-shared/login-vmok/v/1.0.1","https://www.npmjs.com/package/@webapp-shared/login-vmok/v/2.0.1","https://www.npmjs.com/package/@webapp-shared/login-vmok/v/3.0.0","https://www.npmjs.com/package/@webapp-shared/login-vmok/v/1.1.0"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-18356","license":"OSV · upstream source license applies","key":"osv:MAL-2026-18356","identifiers":["MAL-2026-18356"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-27c3440f97484dda858dd714de0d758d","complete":true,"records":13630,"lastAttemptAt":"2026-11-07T07:38:48.4100635+00:00","lastSuccessAt":"2026-11-07T07:38:48.406+00:00","error":null,"lastVerifiedAt":"2026-11-07T07:38:48.406+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-07T07:27:10.0308911+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-07T07:27:10.0308911+00:00","lastSuccessAt":"2026-11-07T07:27:10.181531+00:00","error":null,"lastVerifiedAt":"2026-11-07T07:27:10.1815313+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. 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