{"id":"MAL-2026-16333","revision":null,"records":[{"revision":"e4ab429274fc47d29bd7961d5518ed3a","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"MAL-2026-16333","aliases":["GHSA-x567-p88w-3697"],"title":"Malicious code in homestack-cheer (npm)","description":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (f475cd8b8a3e1dd4563ca0b20d85fde83576ed78c27eb91ca1cd77fbebe0d142)\nThe package is published as homestack-cheer with description 'JS lib support cheerleading', but the README and the UMD build (dist/my-lib.umd.js) present it as a trivial hello-world 'greet' library. The ESM entrypoint declared in package.json 'module' (src/index.js) and src/env_load.js each end with `new Function(atob('<~180KB base64>')).call(this)`, decoding an obfuscated second-stage payload via a runtime string-shuffle routine. When a downstream project bundles this package with webpack/rollup, the ESM path is resolved and the hidden payload is embedded into the resulting application bundle and executed in end-users' browsers. The decoded payload checks `window.location` for the substring 'checkout' and, when a Stripe payment element iframe (#stripe-payment-element iframe) is present, hides the real Stripe iframe, clears the disabled state on the place-order button, and injects a look-alike iframe with id `__privateStripeFrame84331` to intercept card input. The divergence between the benign `main` (UMD greet) and the malicious `module` (ESM Function(atob(...))) constitutes deliberate dual-entrypoint smuggling designed to evade casual review of the package's headline file.\n\n## Source: ghsa-malware (b0622f60729e4dec05a0c9f802b4728a7c579d968532a87d664b759da856ad27)\nAny computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.\n","state":0,"publishedAt":"2026-09-21T03:31:35+00:00","modifiedAt":"2026-10-01T23:30:05.895093+00:00","affected":[{"ecosystem":"npm","name":"homestack-cheer","ranges":[],"versions":["1.1.9","1.1.8","1.1.7","1.1.6","1.1.5","1.1.3","1.1.2","1.1.1","1.1.0","1.0.2","1.0.1","1.0.0"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/homestack-cheer/v/1.1.9","https://github.com/advisories/GHSA-x567-p88w-3697"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-16333","license":"OSV · upstream source license applies","key":"osv:MAL-2026-16333","identifiers":["MAL-2026-16333","GHSA-x567-p88w-3697"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-11T20:58:42.4460032+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-11T20:58:42.4460032+00:00","lastSuccessAt":"2026-11-11T20:58:42.6009016+00:00","error":null,"lastVerifiedAt":"2026-11-11T20:58:42.6009024+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-de3b77103708811b6494d2ff7c979037d73ae579742cd1649a5c765137ae5083-bc2564cf749a574ebe6216cd53b2772c98ccf01e107d9e465c7cb9637c59db40","complete":true,"records":424281,"lastAttemptAt":"2026-11-11T20:56:40.1262638+00:00","lastSuccessAt":"2026-11-11T19:56:47.8167322+00:00","error":null,"lastVerifiedAt":"2026-11-11T20:56:40.1262638+00:00","snapshotPublishedAt":"2026-11-11T19:18:45+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-cbeeeca22e4a4c188e95cc4f8cfc6560","complete":false,"records":13759,"lastAttemptAt":"2026-11-11T21:08:58.0161049+00:00","lastSuccessAt":"2026-11-11T21:08:58.011+00:00","error":"249 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-11T21:08:58.011+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13368,"expectedIdentifiers":13813,"failedIdentifiers":249},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-11T20:58:42.4460032+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-11T20:58:42.4460032+00:00","lastSuccessAt":"2026-11-11T20:58:42.6018487+00:00","error":null,"lastVerifiedAt":"2026-11-11T20:58:42.6018491+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-f58072f00ed84b8dbc554f4a4e66e21a","complete":true,"records":13753,"lastAttemptAt":"2026-11-11T20:59:01.4643428+00:00","lastSuccessAt":"2026-11-11T20:59:01.459+00:00","error":null,"lastVerifiedAt":"2026-11-11T20:59:01.459+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13813,"expectedIdentifiers":13813,"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-3562b6c78fd1bd0f0b55daf66a0926ae24f65e462df7f6d928caad458fc696bf","complete":true,"records":9947,"lastAttemptAt":"2026-11-11T20:58:42.3041045+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-11T20:58:42.3041045+00:00","snapshotPublishedAt":"2026-11-11T03:32:46+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-456002455e0ab94bb92c95476d4e6d175c104cd594749982afd96c893728ecbc","complete":true,"records":2010,"lastAttemptAt":"2026-11-11T20:56:40.2809572+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-11T20:56:40.2809572+00:00","snapshotPublishedAt":"2026-11-11T01:17:51+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-baa8362b4daf9e5f39d5563775a55935e7b442c0735d33274a921579ce4a0d66","complete":true,"records":3093,"lastAttemptAt":"2026-11-11T20:58:42.411286+00:00","lastSuccessAt":"2026-11-11T13:00:02.5446881+00:00","error":null,"lastVerifiedAt":"2026-11-11T20:58:42.411286+00:00","snapshotPublishedAt":"2026-11-11T12:47:47+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-757d3692f9a7b34792dad960197f3cc953a54db59b7d0ffe3835a0ed9926f76b","complete":true,"records":231690,"lastAttemptAt":"2026-11-11T20:58:42.1683586+00:00","lastSuccessAt":"2026-11-11T20:58:40.6131056+00:00","error":null,"lastVerifiedAt":"2026-11-11T20:58:42.1683586+00:00","snapshotPublishedAt":"2026-11-11T20:03:03+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}