registry  /  yarr-mcp  /  0.4.0

yarr-mcp@0.4.0

Node launcher for the yarr MCP and CLI binary.

Static Scan Results

scanned 2h ago · by rust-scanner

Static analysis flagged 11 finding(s) at 72.0% confidence. This version is warn-only unless an AI or security-team review confirms malicious behavior.

Static reason
One or more suspicious static signals were detected.

Decision evidence

public snapshot
Behavioral surface
Source
ChildProcessEnvironmentVarsFilesystemNetwork
Supply chain
HighEntropyStringsUrlStrings
ManifestNo manifest risk signals triggered.
scanned 3 file(s), 4.52 KB of source, external domains: github.com

Source & flagged code

4 flagged · loading source
package.jsonView file
•scripts.postinstall = node scripts/install.js
High
Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg
•scripts.postinstall = node scripts/install.js
Medium
Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg
bin/yarr.jsView file
5const path = require("node:path"); L6: const { spawnSync } = require("node:child_process"); L7: const { binaryPath } = require("../lib/platform");
High
Child Process

Package source references child process execution.

bin/yarr.jsView on unpkg · L5
scripts/install.jsView file
4const fs = require("node:fs"); L5: const https = require("node:https"); L6: const os = require("node:os"); L7: const path = require("node:path"); L8: const { spawnSync } = require("node:child_process"); L9: const { ... L17: function log(message) { L18: process.stderr.write(`yarr: ${message}\n`); L19: }
High
Command Output Exfiltration

Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.

scripts/install.jsView on unpkg · L4

Findings

3 High4 Medium4 Low
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processbin/yarr.js
HighCommand Output Exfiltrationscripts/install.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings