{"id":"MAL-2026-16273","revision":null,"records":[{"revision":"2fd14da4ada44fe08804715a930962f9","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"MAL-2026-16273","aliases":[],"title":"Malicious code in blue-string-formatter-utils (npm)","description":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (aa3c9f5edcc636fc8d38e40a6bb225aed8f6b638be31f2abf8b6e747212c9565)\nThe package advertises itself as 'Utility helpers for string formatting' but its shipped main file performs a single behavior: an XMLHttpRequest GET to the protocol-relative URL //xss.report/c/k3rne111 whose response body is passed directly to eval(). Any require()/import of this package causes arbitrary attacker-controlled JavaScript from xss.report to execute in the consumer's Node process, with no pinning, no integrity check, and no relationship to the advertised functionality. The mismatch between the package's stated purpose (string utilities) and its actual contents (a remote-code loader) is a cover-story pattern.\n","state":0,"publishedAt":"2026-09-17T23:19:27+00:00","modifiedAt":"2026-09-18T01:00:06.6144121+00:00","affected":[{"ecosystem":"npm","name":"blue-string-formatter-utils","ranges":[],"versions":["1.0.0"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/blue-string-formatter-utils/v/1.0.0"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-16273","license":"OSV · upstream source license applies","key":"osv:MAL-2026-16273","identifiers":["MAL-2026-16273"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-13T05:18:48.7948660+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-13T05:18:48.794866+00:00","lastSuccessAt":"2026-11-13T05:18:48.9994933+00:00","error":null,"lastVerifiedAt":"2026-11-13T05:18:48.9995061+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-1c5172d098efb637fed8eab7555210eb25d4abf20f74026a02377bb1124cd3de","complete":true,"records":424960,"lastAttemptAt":"2026-11-13T05:16:37.7971751+00:00","lastSuccessAt":"2026-11-13T05:16:37.7566327+00:00","error":null,"lastVerifiedAt":"2026-11-13T05:16:37.7971751+00:00","snapshotPublishedAt":"2026-11-13T04:23:58+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-81649827bed04d178218ae3481877efc","complete":false,"records":13793,"lastAttemptAt":"2026-11-13T05:28:42.5594492+00:00","lastSuccessAt":"2026-11-13T05:28:42.555+00:00","error":"563 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-13T05:28:42.555+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13226,"expectedIdentifiers":13846,"failedIdentifiers":563},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-13T05:18:48.7948660+00:00","complete":true,"records":1123,"lastAttemptAt":"2026-11-13T05:18:48.794866+00:00","lastSuccessAt":"2026-11-13T05:18:49.0004529+00:00","error":null,"lastVerifiedAt":"2026-11-13T05:18:49.0004538+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-77eeb9ad53d240dc91f8e3d507ac52a2","complete":false,"records":13781,"lastAttemptAt":"2026-11-13T05:18:54.2339757+00:00","lastSuccessAt":"2026-11-13T04:18:42.877+00:00","error":"12 identifier lookups failed; latest failures include HttpError (HTTP 503). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-13T04:18:42.877+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13834,"expectedIdentifiers":13846,"failedIdentifiers":12},{"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":"2026-11-13T05:18:48.714791+00:00","lastSuccessAt":"2026-11-12T23:19:15.5239119+00:00","error":null,"lastVerifiedAt":"2026-11-13T05:18:48.714791+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":"2026-11-13T05:16:37.937734+00:00","lastSuccessAt":"2026-11-12T18:16:50.7862525+00:00","error":null,"lastVerifiedAt":"2026-11-13T05:16:37.937734+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":"2026-11-13T05:18:48.7320885+00:00","lastSuccessAt":"2026-11-12T22:18:31.0338213+00:00","error":null,"lastVerifiedAt":"2026-11-13T05:18:48.7320885+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-9c400afecc368c19e27d85b853d7f36c26a1688896f9e96b3e569d052492b938","complete":true,"records":231765,"lastAttemptAt":"2026-11-13T05:18:48.5554824+00:00","lastSuccessAt":"2026-11-13T05:18:46.7416005+00:00","error":null,"lastVerifiedAt":"2026-11-13T05:18:48.5554824+00:00","snapshotPublishedAt":"2026-11-13T04:48:05+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}