{"id":"MAL-2026-18178","revision":null,"records":[{"revision":"094d4341045f41bb8e5946ba8c8d495a","observedAt":"2026-10-26T19:35:57.103+00:00","statement":{"source":"osv","id":"MAL-2026-18178","aliases":[],"title":"Malicious code in event-emitter-testmetest (npm)","description":"event-emitter-testmetest was published by npm account `testnewtestme2` on 2026-10-21, first to test the delivery chain of data-pipeline-testmetest 2.0.1 and then to ship it. 1.0.6 and 1.0.7 ship an obfuscated `index.js` loader that decrypts a filler stage and pipes it into Bun with the full environment: 1.0.6 runs it on load, 1.0.7 on `npm install` via a `binding.gyp` source `<!(env node index.js >/dev/null 2>&1; echo stub.c)`. 4.1.0 and 5.0.0 ship rebuilds of the full stealer behind the same `binding.gyp` hook: inline in `index.js` in 4.1.0, and in an encrypted `data.bin` that `index.js` decrypts in 5.0.0. Other versions carry no executable payload.\n\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (8d4e6bad5d24d9c63960e77cc82c054c3b14704bea931cd48c86025fa4dc45c9)\nThe package's `main` (index.js) is a multi-layer obfuscated loader: a String.fromCharCode-reconstructed string is Caesar-shifted (k=19) and eval'd, which then AES-128-GCM-decrypts a hardcoded hex ciphertext using embedded key/iv/authTag and executes the plaintext via a dynamic `Function(module, require, process, Buffer, __filename, __dirname, <plaintext>)` call, giving the decrypted bytes full Node module, require, and process access. The payload is opaque to any installer. `binding.gyp` declares a target with no native source files and uses GYP command-expansion (`<!(env node index.js...)`) in `sources`, which runs the loader during `node-gyp rebuild` — npm invokes node-gyp automatically whenever `binding.gyp` is present, so the loader runs on `npm install` even though `package.json.scripts` contains no install hook. The same loader also executes whenever another module `require`s this package. The stacked charcode+Caesar+AES-GCM obfuscation and the use of a no-sources `binding.gyp` purely to trigger node-gyp are consistent only with hiding and auto-executing attacker-controlled code against the installer host.\n","state":0,"publishedAt":"2026-10-21T16:00:00+00:00","modifiedAt":"2026-10-26T19:00:41.769478+00:00","affected":[{"ecosystem":"npm","name":"event-emitter-testmetest","ranges":[],"versions":["1.0.6","1.0.7","4.1.0","5.0.0"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/event-emitter-testmetest","https://www.npmjs.com/package/event-emitter-testmetest/v/5.0.0","https://www.npmjs.com/package/event-emitter-testmetest/v/4.1.0","https://www.npmjs.com/package/event-emitter-testmetest/v/1.0.7","https://www.npmjs.com/package/event-emitter-testmetest/v/1.0.6"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-18178","license":"OSV · upstream source license applies","key":"osv:MAL-2026-18178","identifiers":["MAL-2026-18178"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-07T16:07:52.6079466+00:00","complete":true,"records":1769,"lastAttemptAt":"2026-11-07T16:07:52.6079466+00:00","lastSuccessAt":"2026-11-07T16:07:52.8396759+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:52.8396778+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-bb5c9d5a08063ef076042e33dd72a7d0ffa4c4487efdcf3106e29ba55ec2ad57-c173d89a3f1a0bdb31cd68e866be332a5016302f586ede89a35ec193ac99504a","complete":true,"records":420933,"lastAttemptAt":"2026-11-07T16:07:52.127477+00:00","lastSuccessAt":"2026-11-07T16:07:52.0557652+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:52.127477+00:00","snapshotPublishedAt":"2026-11-07T15:22:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. 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-bee3dfbd77fe4043986590b0e0b76259","complete":true,"records":13633,"lastAttemptAt":"2026-11-07T16:18:44.6437051+00:00","lastSuccessAt":"2026-11-07T16:18:44.639+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:18:44.639+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":"2026-11-07T16:07:52.6079466+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-07T16:07:52.6079466+00:00","lastSuccessAt":"2026-11-07T16:07:58.5710341+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:58.5710358+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. No reader inventory is sent.","generation":"enrichment-e1c431e1022f4db1b4e459e61c31a4ca","complete":true,"records":13645,"lastAttemptAt":"2026-11-07T16:08:00.6485737+00:00","lastSuccessAt":"2026-11-07T16:08:00.644+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:08:00.644+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-0eb4d6dde62dffacd040ad992d4fd5a65cd7d0dc5f5f4cfa8b41967fc6f9ca5f","complete":true,"records":9914,"lastAttemptAt":"2026-11-07T16:07:52.5107257+00:00","lastSuccessAt":"2026-11-06T20:10:36.6450506+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:52.5107257+00:00","snapshotPublishedAt":"2026-11-06T20:02:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-07T16:07:52.2947928+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:52.2947928+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-335633e78a15c9cde10a6025895b5617717087fb945489ae7e15d377bacf34a9","complete":true,"records":3055,"lastAttemptAt":"2026-11-07T16:07:52.5258708+00:00","lastSuccessAt":"2026-11-06T16:03:00.7615789+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:52.5258708+00:00","snapshotPublishedAt":"2026-11-06T16:02:48+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-40ad6183a951565ace1520a9b4d631e1d0bfb1d4bf7c5574c375032559f3ff53","complete":true,"records":231292,"lastAttemptAt":"2026-11-07T16:07:52.4004477+00:00","lastSuccessAt":"2026-11-07T10:29:00.4821259+00:00","error":null,"lastVerifiedAt":"2026-11-07T16:07:52.4004477+00:00","snapshotPublishedAt":"2026-11-07T09:32:47+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}