regex-linter@5.1.0
Core API client library
AI Security Review
scanned 3d ago · by lpm-firewall-aiThe manifest activates index.js during installation, and that file sends host-identifying data to a fixed external endpoint without installer consent. This supports blocking for installation-time data exfiltration.
Static reason
One or more suspicious static signals were detected.
Trigger
Package installation invokes the postinstall script.
Impact
The collector receives identifying information about the installing user and host.
Mechanism
The script reads the username and hostname and sends them in an HTTPS POST request.
Attack narrative
The postinstall hook runs index.js, which collects the local username and hostname and sends them to a fixed external collector. This is automatic installation-time disclosure with no consent gate in the inspected source.
AI rationale
The manifest activates index.js during installation, and that file sends host-identifying data to a fixed external endpoint without installer consent. This supports blocking for installation-time data exfiltration.
Evidence
package.jsonindex.js
Network endpoints1
nathanaccacio.com/collect
Decision evidence
public snapshotAI called this Malicious at 99.0% confidence as Malware with low false-positive risk.
Evidence for block
- The postinstall hook runs index.js automatically during installation.
- index.js collects the local username and hostname, then sends them in a POST request to a fixed external collector without a consent check.
Evidence against
Behavioral surface
Network
NoLicense
Source & flagged code
5 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node index.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg6"scripts": {
"postinstall": "node index.js"
}
}
High
Suspicious Lifecycle Evidence
The postinstall hook runs index.js automatically during installation.
package.jsonView on unpkg · L6index.jsView file
1const https = require('https');
L2: const os = require('os');
...
L4: p: 'regex-linter',
L5: u: os.userInfo().username,
L6: h: os.hostname()
L7: });
...
L15: req.on('error', () => {});
L16: req.write(data);
L17: req.end();
High
Host Fingerprint Exfiltration
Source collects local host identity data and sends it to an external endpoint.
index.jsView on unpkg · L1Findings
5 High1 Medium2 Low
HighInstall Time Lifecycle Scriptspackage.json
HighHost Fingerprint Exfiltrationindex.js
HighSuspicious Lifecycle Evidencepackage.json
HighAi Review Evidenceindex.js
HighAi Review Evidenceindex.js
MediumNetwork
LowScripts Present
LowNo License
Affected versions and remediation
This report applies to regex-linter@5.1.0.
See all versions of regex-linter for other recorded verdicts.
- Avoid installing regex-linter@5.1.0. 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.