registry / Data exfiltration / @postex/common
@postex/common
This report shows the evidence for @postex/common@99.9.1, the only known version.
This package appears in our research on the dependency confusion probes at version 99 and above, with how it works, the full package list and what to do if you installed it.
AI Security Review
scanned 4d ago · by lpm-firewall-aiThe package brings in a remote dependency with an automatic preinstall hook that sends machine and user identifiers to an OAST endpoint. This is concrete installation-time data disclosure, so the package should be blocked.
Static reason
One or more suspicious static signals were detected.
Trigger
Dependency installation runs its preinstall hook.
Impact
The collector can learn identifying information about the installing machine and user.
Mechanism
The hook reads the hostname, home directory, and username, hex-encodes them, and places each value in a request subdomain.
Attack narrative
Installing @postex/common installs a remote tarball dependency. Its preinstall hook runs a helper that encodes the machine hostname, home directory, and username, then sends requests to a subdomain of an OAST collector. This is automatic installation-time disclosure; no recipient-specific consent guard appears in the inspected path.
AI rationale
The package brings in a remote dependency with an automatic preinstall hook that sends machine and user identifiers to an OAST endpoint. This is concrete installation-time data disclosure, so the package should be blocked.
Evidence
package.json.lpm-dependency-evidence-ac6813b7-3aef-4c33-978b-6eae6d1e7d26/0/npm-linux/package.json.lpm-dependency-evidence-ac6813b7-3aef-4c33-978b-6eae6d1e7d26/0/npm-linux/test.js.lpm-dependency-evidence-ac6813b7-3aef-4c33-978b-6eae6d1e7d26/0/npm-linux/index.js
Network endpoints1
postex-common.ltim5ksu8k9f46ogui6th52kcbi96zuo.oastify.com
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- The package manifest installs a dependency from a remote tarball.
- That dependency runs a helper automatically during preinstall.
- The helper reads the machine hostname, home directory, and username, then sends each value to a subdomain of an OAST collector.
- The network speed helper makes an HTTP request to the supplied URL, carrying those values in the subdomain.
Evidence against
Behavioral surface
Trivial
Source & flagged code
7 flagged · loading sourcepackage.jsonView file
10"ltidisafe": "https://ltidi.storage.googleapis.com/depenconf/ltidisafe-3.9.5.tgz"
},
"author": "",
"license": "ISC"
}
High
Suspicious Dependency Evidence
The package manifest installs a dependency from a remote tarball.
package.jsonView on unpkg · L10•Remote tarball dependency specs: ltidisafe@https://ltidi.storage.googleapis.com/depenconf/ltidisafe-3.9.5.tgz
Medium
Remote Tarball Dependency
Package manifest contains a dependency pinned to a remote tarball URL.
package.jsonView on unpkg.lpm-dependency-evidence-ac6813b7-3aef-4c33-978b-6eae6d1e7d26/0/npm-linux/package.jsonView file
7"preinstall": "node test.js > /dev/null 2>&1",
"test": "echo \"Error: no test specified\" && exi
High
Findings
6 High1 Medium1 Low
HighSuspicious Dependency Evidencepackage.json
HighSuspicious Dependency Evidence.lpm-dependency-evidence-ac6813b7-3aef-4c33-978b-6eae6d1e7d26/0/npm-linux/package.json
HighAi Review Evidence.lpm-dependency-evidence-ac6813b7-3aef-4c33-978b-6eae6d1e7d26/0/npm-linux/test.js
HighAi Review Evidence.lpm-dependency-evidence-ac6813b7-3aef-4c33-978b-6eae6d1e7d26/0/npm-linux/test.js
HighAi Review Evidence.lpm-dependency-evidence-ac6813b7-3aef-4c33-978b-6eae6d1e7d26/0/npm-linux/index.js
HighAi Review Evidence.lpm-dependency-evidence-ac6813b7-3aef-4c33-978b-6eae6d1e7d26/0/npm-linux/test.js
MediumRemote Tarball Dependencypackage.json
LowScripts Present
Affected versions and remediation
This report applies to @postex/common@99.9.1.
The versions list below shows the verdict for each recorded version.
- Avoid installing @postex/common@99.9.1. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.