{"id":"MAL-2026-17760","revision":null,"records":[{"revision":"1ab07a8c258f431cb40c73b4f9871208","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"MAL-2026-17760","aliases":["GHSA-5h58-475h-6287"],"title":"Malicious code in @coopeuch/common (npm)","description":"\n---\n_-= Per source details. Do not edit below this line.=-_\n\n## Source: amazon-inspector (887c41c0805d7d223c499e702796cf46727b0be152b7c8a65607907afb3b5d59)\n@coopeuch/common@1.999.999 publishes to the public npm registry under a scope the publisher does not own, using an inflated version (1.999.999) consistent with the dependency-confusion technique that outranks internal-registry versions. The package's declared postinstall script (postinstall.js) runs automatically on npm install and collects installer-side host and network data — hostname, username, uid/gid, home directory, non-internal network interface addresses with MAC/CIDR, DNS resolver addresses, reverse-DNS internal FQDN, container markers, CI environment-variable presence, npm_config_registry, and the consuming project's package name/version/declared range — then POSTs it as JSON to the hardcoded author-controlled endpoint https://collector.oob.s4yhii.com/_npm-poc/beacon. A secondary DNS beacon is emitted via dns.lookup to a subdomain of oob.s4yhii.com. Any build that resolves @coopeuch/common from the public registry (including internal builds referencing the @coopeuch scope) will auto-exfiltrate internal hostnames, MAC addresses, usernames, internal registry URLs, and project identity to a third-party collector at install time. The package's README self-labels this as a coordinated-disclosure proof of concept; the harvesting and off-host upload nonetheless occur without installer opt-in.\n\n## Source: ghsa-malware (7bb4ede3c2c6108558588512db3e190f0255516a40707bd801219d684b0aaff9)\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":"2026-10-11T13:58:48+00:00","modifiedAt":"2026-10-12T19:30:04.5574035+00:00","affected":[{"ecosystem":"npm","name":"@coopeuch/common","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"}]}],"versions":["1.999.999"],"rawVersionEvidence":null}],"metrics":[],"references":["https://www.npmjs.com/package/@coopeuch/common/v/1.999.999","https://github.com/advisories/GHSA-5h58-475h-6287"],"sourceUrl":"https://osv.dev/vulnerability/MAL-2026-17760","license":"OSV · upstream source license applies","key":"osv:MAL-2026-17760","identifiers":["MAL-2026-17760","GHSA-5h58-475h-6287"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-10T09:21:39.5670180+00:00","complete":true,"records":1773,"lastAttemptAt":"2026-11-10T09:21:39.567018+00:00","lastSuccessAt":"2026-11-10T09:21:39.7230126+00:00","error":null,"lastVerifiedAt":"2026-11-10T09:21:39.7230148+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-8bdcdeeb414e06ff50ed637d818ac25d52680d19f71fc0ebe3f4c4b3f836ed38","complete":true,"records":421927,"lastAttemptAt":"2026-11-10T09:21:38.2251552+00:00","lastSuccessAt":"2026-11-10T09:21:38.1064889+00:00","error":null,"lastVerifiedAt":"2026-11-10T09:21:38.2251552+00:00","snapshotPublishedAt":"2026-11-10T09:20:43+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-2e6a476534094233b48f2f0b6da5cf35","complete":true,"records":13689,"lastAttemptAt":"2026-11-10T09:22:06.7603645+00:00","lastSuccessAt":"2026-11-10T06:05:35.03+00:00","error":null,"lastVerifiedAt":"2026-11-10T06:05:35.03+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13742,"expectedIdentifiers":13742,"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":"2026-11-10T09:21:39.5670180+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-10T09:21:39.567018+00:00","lastSuccessAt":"2026-11-10T09:21:39.7239823+00:00","error":null,"lastVerifiedAt":"2026-11-10T09:21:39.7239826+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-31ba7927d759462ab5120f3eef3ca629","complete":false,"records":13695,"lastAttemptAt":"2026-11-10T09:22:06.1277445+00:00","lastSuccessAt":"2026-11-10T09:22:06.124+00:00","error":"100 identifier lookups failed; latest failures include request timeout. Other identifiers were checked independently.","lastVerifiedAt":"2026-11-10T09:22:06.124+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13642,"expectedIdentifiers":13742,"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":"2026-11-10T09:21:39.3678777+00:00","lastSuccessAt":"2026-11-10T00:04:19.8260565+00:00","error":null,"lastVerifiedAt":"2026-11-10T09:21:39.3678777+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":"2026-11-10T09:21:39.1274719+00:00","lastSuccessAt":"2026-11-09T21:02:20.472473+00:00","error":null,"lastVerifiedAt":"2026-11-10T09:21:39.1274719+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":"2026-11-10T09:21:39.5260038+00:00","lastSuccessAt":"2026-11-10T08:04:45.5923716+00:00","error":null,"lastVerifiedAt":"2026-11-10T09:21:39.5260038+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-4331051b0b2d4ccdbdca3aa196b0be3818a465064a4b18dde4cf39c2250eb490","complete":true,"records":231599,"lastAttemptAt":"2026-11-10T09:21:39.251251+00:00","lastSuccessAt":"2026-11-10T08:04:37.1757322+00:00","error":null,"lastVerifiedAt":"2026-11-10T09:21:39.251251+00:00","snapshotPublishedAt":"2026-11-10T07:33:02+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}