web-vitals-polyfill-core-v1

{"schema_version":"1.7.4","id":"MAL-2026-17303","published":"2026-09-30T00:39:47Z","modified":"2026-09-30T06:45:09.490752744Z","aliases":["GHSA-h475-44q2-vfjx"],"summary":"Malicious code in web-vitals-polyfill-core-v1 (npm)","details":"\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","affected":[{"package":{"name":"web-vitals-polyfill-core-v1","ecosystem":"npm"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"}]}],"versions":["1.0.0"],"database_specific":{"cwes":[{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"},{"cweId":"CWE-506","description":"The product contains code that appears to be malicious in nature.","name":"Embedded Malicious Code"}],"indicators":{"evidence_files":[{"path":"disk/index.min.js","sha256":"76ec2b68807c6ef7ae1e93dbc31b21d0ab1fa8ea865719a9b8b85f1bdb295dfe","tlsh":"e391e796cec72e94d7f8815b35ec7eee0c8e538b3ce3699e525be5d9600940141c58f4"}],"package_integrity":[{"filename":"web-vitals-polyfill-core-v1-1.0.0.tgz","hashes":{"sha1":"eed8f8e6cb0ca54e780186b679a466ac774d156d","sha512_sri":"sha512-+cAO6H59vIT9kOsrXQIoYfR+/KPW3TrSC1AaYkkl+P/hGwsnf8/X6FrzegHqsdxWNPdkwe5nlF/ZPkVt6UBQqQ=="}}]}}}],"references":[{"type":"PACKAGE","url":"https://www.npmjs.com/package/web-vitals-polyfill-core-v1/v/1.0.0"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-h475-44q2-vfjx"}],"database_specific":{"malicious-packages-origins":[{"id":"IN-MAL-2026-020749","import_time":"2026-09-30T00:52:54.455745166Z","modified_time":"2026-09-30T00:39:47Z","sha256":"38311c0f483e9485a7b5e8aa7f9a093a40203d8e1a025c0bf5850c2874cffdfa","source":"amazon-inspector","versions":["1.0.0"]},{"id":"GHSA-h475-44q2-vfjx","import_time":"2026-09-30T06:43:04.831589026Z","modified_time":"2026-09-30T05:45:42Z","ranges":[{"events":[{"introduced":"0"}],"type":"SEMVER"}],"sha256":"583291fe7133304271006d1ca425c04aebce7279be07963310434403dfc19319","source":"ghsa-malware"}]},"credits":[{"name":"Amazon Inspector","contact":["inspector-research@amazon.com"],"type":"FINDER"}]}