🛡️ MAL-2026-5537 — xerxes-client-js

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Malicious code in @entos-ems/xerxes-client-js (npm)

Source: amazon-inspector

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.

Affected software

MAL-2026-5537 is recorded against 1 package.

  • @entos-ems/xerxes-client-js

Timeline and source

Published on 11 June 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

www.npmjs.com (Package)

Details

Severity Unknown
CVSS Score N/A
CVSS Vector N/A
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-06-11
Updated 2026-08-12
Modified 2026-06-11
Fix URL N/A

Affected Packages

Software From version Fixed in
@entos-ems/xerxes-client-js — —

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