{"id":"MAL-2026-782","revision":null,"records":[{"revision":"c8c49775a92e4dfda6b48a7bfbac912a","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"MAL-2026-782","aliases":[],"title":"Malicious code in ac-polyfills (npm)","description":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (98dfac851a08e8e8967e1386dadfd513226414b0ed65f6479a914479eb903878)\nac-polyfills@2.10.0 declares a preinstall lifecycle script in package.json (line 7-8) that runs `wget` to a hardcoded webhook.site collector URL (https://webhook.site/381d4406-8f87-4aab-961f-7a9496c21821/), sending the installer's username ($(whoami)), current working directory ($(pwd)), and hostname ($(hostname)) as query parameters. This fires automatically on `npm install` with no user interaction, exfiltrating installer identity and host information to a third-party webhook collector. The package name and shape are consistent with a dependency-confusion probe targeting an internal package name.\n\n## Source: ossf-package-analysis (c374cffaf0245c256691284c7b1c5dbeb5202f8d633efe3d23bc46c5c08806a9)\nThe OpenSSF Package Analysis project identified 'ac-polyfills' @ 2.10.0 (npm) as malicious.\n\nIt is considered malicious because:\n\n- The package executes one or more commands associated with malicious behavior.\n","state":0,"publishedAt":"2026-02-06T02:07:02+00:00","modifiedAt":"2026-09-21T05:30:06.3405945+00:00","affected":[{"ecosystem":"npm","name":"ac-polyfills","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":["99.9.9","2.10.0"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/ac-polyfills/v/2.10.0"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-782","license":"OSV · upstream source license applies","key":"osv:MAL-2026-782","identifiers":["MAL-2026-782"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-13T02:18:19.0235777+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-13T02:18:19.0235777+00:00","lastSuccessAt":"2026-11-13T02:18:19.1952529+00:00","error":null,"lastVerifiedAt":"2026-11-13T02:18:19.1952559+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-d8fa82e95fdb59244e2f635e667ba17f0796ca0a4f1f4bb8cc31febcd660b76c-d88a1fdb6e581828ea29fe8c78fbc7626fed11d7056636f79a35d339eb4ed6bf","complete":true,"records":424939,"lastAttemptAt":"2026-11-13T02:16:25.192812+00:00","lastSuccessAt":"2026-11-13T02:16:25.1479457+00:00","error":null,"lastVerifiedAt":"2026-11-13T02:16:25.192812+00:00","snapshotPublishedAt":"2026-11-13T01:28:22+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-d86796ab778941dc80322fb5ca38133d","complete":false,"records":13793,"lastAttemptAt":"2026-11-13T02:26:24.2902902+00:00","lastSuccessAt":"2026-11-13T02:26:24.3543204+00:00","error":null,"lastVerifiedAt":"2026-11-13T02:26:24.3543204+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-13T02:18:19.0235777+00:00","complete":true,"records":1123,"lastAttemptAt":"2026-11-13T02:18:19.0235777+00:00","lastSuccessAt":"2026-11-13T02:18:19.1960261+00:00","error":null,"lastVerifiedAt":"2026-11-13T02:18:19.1960262+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-53086f18733d4bf6a716de0418c65ebd","complete":true,"records":13781,"lastAttemptAt":"2026-11-13T02:18:24.4548303+00:00","lastSuccessAt":"2026-11-13T02:18:24.451+00:00","error":null,"lastVerifiedAt":"2026-11-13T02:18:24.451+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13846,"expectedIdentifiers":13846,"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-93e76d404e1aeb6a7e8902f5ffa06211fc86dea3b1958e297abb2668aa5e6e8c","complete":true,"records":9952,"lastAttemptAt":"2026-11-13T02:18:18.9753802+00:00","lastSuccessAt":"2026-11-12T23:19:15.5239119+00:00","error":null,"lastVerifiedAt":"2026-11-13T02:18:18.9753802+00:00","snapshotPublishedAt":"2026-11-12T23:03:02+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-4d60731753a2f72e455d1086e7203d0ef10843936dcc1cf2b45135e2caa204b0","complete":true,"records":2012,"lastAttemptAt":"2026-11-13T02:16:25.2372679+00:00","lastSuccessAt":"2026-11-12T18:16:50.7862525+00:00","error":null,"lastVerifiedAt":"2026-11-13T02:16:25.2372679+00:00","snapshotPublishedAt":"2026-11-12T17:48:11+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-20d1a8ab073a1c13ab2143dbcadb34ebb8edf1e18e16482b448513662c3d1e12","complete":true,"records":3127,"lastAttemptAt":"2026-11-13T02:18:18.9876547+00:00","lastSuccessAt":"2026-11-12T22:18:31.0338213+00:00","error":null,"lastVerifiedAt":"2026-11-13T02:18:18.9876547+00:00","snapshotPublishedAt":"2026-11-12T22:18:06+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-dc5477b487c9cb40a7a59f940ef79298ddd8743e3c3dcfd82edc84c9cc9c3545","complete":true,"records":231743,"lastAttemptAt":"2026-11-13T02:18:18.8048835+00:00","lastSuccessAt":"2026-11-13T02:18:17.366112+00:00","error":null,"lastVerifiedAt":"2026-11-13T02:18:18.8048835+00:00","snapshotPublishedAt":"2026-11-13T01:33:07+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}