{"id":"GHSA-f3g4-6hpx-9mcq","revision":null,"records":[{"revision":"66429e62ce4b466fba59e3216dc5f092","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"MAL-2026-16379","aliases":["GHSA-f3g4-6hpx-9mcq"],"title":"Malicious code in @user-services/web-components (npm)","description":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (02523ee1cb3bbb9119054ec3ed14ffc62d0d33ae3bd44dc29312c772cdba106b)\n@user-services/web-components@9.9.10 fires a hidden telemetry probe on both the npm install lifecycle (`node index.js`) and on every `require()` of the module. The probe in probe/impl.js reads os.userInfo().username, os.hostname() and the basename of process.cwd(), concatenates them with a prefix `uswc` and a timestamp into a subdomain of `oob.algamil7x.xyz`, and issues a `dns.resolve4` query — the query name itself is the exfiltration channel, delivering installer identity to the attacker-controlled authoritative nameserver. The exfil pipeline is deliberately hidden from static analysis: supporting modules (b8d6e3.js, c9e7f4.js) reconstruct the strings `os`, `dns`, `process`, `userInfo`, `hostname`, `cwd`, `resolve4` and the destination host `oob.algamil7x.xyz` from `String.fromCharCode` byte arrays, and load the `os` and `dns` core modules via `module.constructor._load(...)` instead of a static `require`. The destination host is not the declared homepage and is not documented anywhere in the package. The scope `@user-services` and its placeholder repository/author metadata (`github.com/user-services/web-components`, `eng@user-services.dev`) are generic and consistent with a dependency-confusion lure aimed at organisations with an internal `@user-services/*` scope.\n\n## Source: ghsa-malware (a26643867a117b96b0d18cd07cbec2dbc5968abf2ea90f77d2999de7806a4721)\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":"2026-09-22T13:57:51+00:00","modifiedAt":"2026-10-12T14:00:05.7920123+00:00","affected":[{"ecosystem":"npm","name":"@user-services/web-components","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":["9.9.10"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/@user-services/web-components/v/9.9.10","https://github.com/advisories/GHSA-f3g4-6hpx-9mcq"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-16379","license":"OSV · upstream source license applies","key":"osv:MAL-2026-16379","identifiers":["MAL-2026-16379","GHSA-f3g4-6hpx-9mcq"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-10T11:25:04.0778179+00:00","complete":true,"records":1773,"lastAttemptAt":"2026-11-10T11:25:04.0778179+00:00","lastSuccessAt":"2026-11-10T11:25:05.0136335+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:25:05.0136358+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-8859cf40d4337e24bd2f258cc7778fbad01bb24c79d057aaf34cf1dfc6f8917d-7f63d5ae9ad1cf5d15daca54e2cb44cc953d9727a9c4dbe21f340d16ec79e07a","complete":true,"records":421929,"lastAttemptAt":"2026-11-10T11:21:40.8171583+00:00","lastSuccessAt":"2026-11-10T11:21:40.7840841+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:21:40.8171583+00:00","snapshotPublishedAt":"2026-11-10T10:23:15+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-d438db76762e40e09fae683c91dc71f3","complete":true,"records":13691,"lastAttemptAt":"2026-11-10T11:26:02.3053181+00:00","lastSuccessAt":"2026-11-10T11:26:02.298+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:26:02.298+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13744,"expectedIdentifiers":13744,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-10T11:25:04.0778179+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-10T11:25:04.0778179+00:00","lastSuccessAt":"2026-11-10T11:25:05.0144698+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:25:05.0144706+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-c3b5116d0840469fb49189e776b1e7eb","complete":false,"records":13697,"lastAttemptAt":"2026-11-10T11:25:33.4594859+00:00","lastSuccessAt":"2026-11-10T11:25:33.455+00:00","error":"100 identifier lookups failed; latest failures include request timeout. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-10T11:25:33.455+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13642,"expectedIdentifiers":13744,"failedIdentifiers":100},{"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-cdffb4589856378aa42e8d1bd4a6c74e27a180d8160bf764c44715ef760f0a62","complete":true,"records":9932,"lastAttemptAt":"2026-11-10T11:25:03.699196+00:00","lastSuccessAt":"2026-11-10T00:04:19.8260565+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:25:03.699196+00:00","snapshotPublishedAt":"2026-11-09T23:48:01+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-26503967ae4379db8f374089589d6e03fb15bd31f820c9e992aaf93840c2236c","complete":true,"records":1971,"lastAttemptAt":"2026-11-10T11:21:41.0754601+00:00","lastSuccessAt":"2026-11-09T21:02:20.472473+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:21:41.0754601+00:00","snapshotPublishedAt":"2026-11-09T20:18:18+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-94169eec81ea3989aa551092397ff34ae53c104b4a6ce646e1524452e4ab2a39","complete":true,"records":3065,"lastAttemptAt":"2026-11-10T11:25:03.948442+00:00","lastSuccessAt":"2026-11-10T08:04:45.5923716+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:25:03.948442+00:00","snapshotPublishedAt":"2026-11-10T06:48:01+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-86f40cdda9ca36627f818d0cc8237a8a8c7c22cb687d6747a4ea12bded69e17e","complete":true,"records":231599,"lastAttemptAt":"2026-11-10T11:25:02.6977972+00:00","lastSuccessAt":"2026-11-10T11:25:00.8551311+00:00","error":null,"lastVerifiedAt":"2026-11-10T11:25:02.6977972+00:00","snapshotPublishedAt":"2026-11-10T11:03:07+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}