{"answers":{"affected":"1 open source package ship an affected version, including @entos-ems/xerxes-client-js.","exploited":"There is no known exploitation of MAL-2026-5537 in the wild and no public exploit code.","fix":"Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.","what":"MAL-2026-5537 is a malicious package in @entos-ems/xerxes-client-js, published on 11 Jun 2026."},"fix_prompt":"MAL-2026-5537 is a malicious package: @entos-ems/xerxes-client-js (npm). Every version was published to cause harm.\n\nTask:\n1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.\n2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.\n3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.\n4. If the package is not used anywhere, say so and change nothing.\n\nReference: https://insights.sbomify.com/MAL-2026-5537/ (Markdown: https://insights.sbomify.com/MAL-2026-5537/index.md)","id":"MAL-2026-5537","markdown":"https://insights.sbomify.com/MAL-2026-5537/index.md","name":"MAL-2026-5537","record":{"aliases":[],"analysis":null,"analysis_generated_by":null,"assigner":null,"cpe":[],"cvss":{"score":null,"severity":null,"source":null,"vector":null,"version":null},"cwes":[],"description":"On `npm install`, package.json's `preinstall: node index.js` hook fires automatically and runs a reconnaissance beacon. index.js collects host identifiers (os.hostname(), process.platform, arch, home directory, username/uid/gid/shell, OS info, cwd) and the output of shell commands `whoami` and `id` (executed via child_process.exec), then POSTs the JSON payload to a hardcoded Burp Collaborator (oastify.com) subdomain at https://98fmeiqizlsgqr14stq21w67ryxplf94.oastify.com/detox56. The package targets the @entos-ems scope and ships no functional client code, consistent with a dependency-confusion attack against an internal namespace.","ecosystems":["npm"],"exploits":{"exploitdb":null,"first_seen":null,"github_poc":null,"max_poc_stars":null,"metasploit":null,"nuclei":null,"refs":[],"tier":null},"has_fix":false,"headline":"Malicious code in @entos-ems/xerxes-client-js (npm)","id":"MAL-2026-5537","indexable":true,"kev":null,"kind":"malicious","links":{"ecosystem":"npm","product":null,"products":[],"type":null,"year":"2026"},"n_packages":1,"n_references":null,"packages":[{"ecosystem":"npm","fixed":[],"introduced":[],"last_affected":[],"package":"@entos-ems/xerxes-client-js","purl":"pkg:npm/%40entos-ems%2Fxerxes-client-js","source":"MAL-2026-5537"}],"products":null,"published":"2026-06-11","related":[],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"OpenSSF Malicious Packages","prefix":"MAL"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":null,"updated":null,"vendors":null},"summary":null,"url":"https://insights.sbomify.com/MAL-2026-5537/"}