{"id":"MAL-2026-17303","revision":null,"records":[{"revision":"e4c3a38d53d040b39eb839dfbdd6136c","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"MAL-2026-17303","aliases":["GHSA-h475-44q2-vfjx"],"title":"Malicious code in web-vitals-polyfill-core-v1 (npm)","description":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (38311c0f483e9485a7b5e8aa7f9a093a40203d8e1a025c0bf5850c2874cffdfa)\nThe package name mimics the widely-used web-vitals polyfill but the tarball ships disk/index.min.js, a base64-wrapped service-worker payload (self.__PWA_ROUTER__.executeTacticalRouting) that resolves an active destination via DoH TXT lookups of api.chinazhangsan.ccwu.cc (queried through doh.pub and dns.alidns.com) with base64-encoded fallback endpoints on gist.githubusercontent.com/chinazhangsan999-crypto and api.npoint.io, performs decoy fetches, and issues Response.redirect(targetUrl, 302) to the resolved host. package.json declares main: index.js which is not present in the tarball, so the package has no legitimate library surface; its shipped code is exclusively the obfuscated redirector, intended to be loaded into a consuming site's service worker where it can hijack end-user navigation to attacker-chosen destinations resolved at runtime through multi-provider DNS-over-HTTPS and paste-site fallbacks.\n\n## Source: ghsa-malware (583291fe7133304271006d1ca425c04aebce7279be07963310434403dfc19319)\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":"2026-09-30T00:39:47+00:00","modifiedAt":"2026-09-30T07:00:32.9982683+00:00","affected":[{"ecosystem":"npm","name":"web-vitals-polyfill-core-v1","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":["1.0.0"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/web-vitals-polyfill-core-v1/v/1.0.0","https://github.com/advisories/GHSA-h475-44q2-vfjx"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-17303","license":"OSV · upstream source license applies","key":"osv:MAL-2026-17303","identifiers":["MAL-2026-17303","GHSA-h475-44q2-vfjx"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-12T04:59:02.1392693+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-12T04:59:02.1392693+00:00","lastSuccessAt":"2026-11-12T04:59:02.3201564+00:00","error":null,"lastVerifiedAt":"2026-11-12T04:59:02.3201571+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-64752486c567b55b31fb0d7225f5222bcd0019564ac0ac5f0649e242c7b19299-ef591e4f0e76c3b422ff0b88d5784af14d3e351e9edea517ce7d635ea6edee46","complete":true,"records":424594,"lastAttemptAt":"2026-11-12T04:56:44.8167998+00:00","lastSuccessAt":"2026-11-12T04:56:44.7933175+00:00","error":null,"lastVerifiedAt":"2026-11-12T04:56:44.8167998+00:00","snapshotPublishedAt":"2026-11-12T04:29:08+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-1556443ae10949beb23dc0d6b75915ad","complete":false,"records":13760,"lastAttemptAt":"2026-11-12T05:06:06.4823798+00:00","lastSuccessAt":"2026-11-12T05:06:06.472+00:00","error":"78 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-12T05:06:06.472+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13735,"expectedIdentifiers":13813,"failedIdentifiers":78},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-12T04:59:02.1392693+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-12T04:59:02.1392693+00:00","lastSuccessAt":"2026-11-12T04:59:02.3208823+00:00","error":null,"lastVerifiedAt":"2026-11-12T04:59:02.3208825+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-80af9ca000ef483a88b41952aab63f47","complete":true,"records":13760,"lastAttemptAt":"2026-11-12T04:59:27.4436031+00:00","lastSuccessAt":"2026-11-12T04:59:27.44+00:00","error":null,"lastVerifiedAt":"2026-11-12T04:59:27.44+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":"2026-11-12T04:59:01.6490656+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-12T04:59:01.6490656+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":"2026-11-12T04:56:44.9519384+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-12T04:56:44.9519384+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":"2026-11-12T04:59:02.0419805+00:00","lastSuccessAt":"2026-11-11T13:00:02.5446881+00:00","error":null,"lastVerifiedAt":"2026-11-12T04:59:02.0419805+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-fda6475739002437b659ab0b5b310aa7608c40371b1aa4c3777924ea9bcf2169","complete":true,"records":231696,"lastAttemptAt":"2026-11-12T04:59:01.5212948+00:00","lastSuccessAt":"2026-11-12T04:58:59.9809674+00:00","error":null,"lastVerifiedAt":"2026-11-12T04:59:01.5212948+00:00","snapshotPublishedAt":"2026-11-12T04:33:21+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}