runcastle@1.4.4
Burn tickets into shipped features with Claude Code.
AI Security Review
scanned 5d ago · by lpm-firewall-aiThe server performs undisclosed runtime telemetry by default, sending an install ID, version, and platform to the package's update endpoint. The limited payload and DO_NOT_TRACK opt-out support a telemetry warning, not a malicious verdict.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
Starting the server.
Impact
The service can associate update checks with a persistent install ID and observe the package version and platform.
Mechanism
The update check posts an install ID, package version, and platform to ping.runcastle.dev. DO_NOT_TRACK avoids that request.
AI rationale
The server performs undisclosed runtime telemetry by default, sending an install ID, version, and platform to the package's update endpoint. The limited payload and DO_NOT_TRACK opt-out support a telemetry warning, not a malicious verdict.
Evidence
bin/runcastle.jsindex.js
Network endpoints2
ping.runcastle.dev/pingregistry.npmjs.org/runcastle/latest
Decision evidence
public snapshotAI called this Suspicious at 93.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- Starting the server triggers an update check automatically.
- By default, the check sends a persistent install ID, package version, and platform to ping.runcastle.dev.
- DO_NOT_TRACK skips the ping and checks npm for the latest version instead.
Evidence against
- The ping payload contains only an install ID, version, and platform; no credentials or project data are shown.
- The package exposes a CLI entry point and documents its Claude Code and Codex runtime credential settings.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShellWebSocket
HighEntropyStringsMinifiedPossibleObfuscationUrlStrings
Source & flagged code
8 flaggedbin/runcastle.jsView file
•matchType = previous_version_dangerous_delta
matchedPackage = runcastle@1.2.11
matchedIdentity = npm:cnVuY2FzdGxl:1.2.11
similarity = 0.400
summary = stored previous version shares package body but lacks this dangerous source file
Critical
Previous Version Dangerous Delta
This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.
bin/runcastle.jsView on unpkg1378// src/pty/kill-tree.ts
L1379: import { spawn } from "child_process";
L1380: function taskkillTree(pid) {
High
Child Process
Package source references child process execution.
bin/runcastle.jsView on unpkg · L13781310if (/\.(cmd|bat)$/i.test(resolved)) {
L1311: return { file: process.env.ComSpec ?? "cmd.exe", args: ["/c", resolved, ...args] };
L1312: }
High
Findings
1 Critical5 High4 Medium5 Low
CriticalPrevious Version Dangerous Deltabin/runcastle.js
HighChild Processbin/runcastle.js
HighShellbin/runcastle.js
HighCredential Redirect Persistenceindex.js
HighCommand Output Exfiltrationbin/runcastle.js
HighCross File Remote Execution Contextbin/runcastle.js
MediumDynamic Requirepty-host.cjs
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowEval
LowWeak Cryptobin/runcastle.js
LowFilesystem
LowHigh Entropy Strings
Low
Affected versions and remediation
This report applies to runcastle@1.4.4.
See all versions of runcastle for other recorded verdicts.
- Review the evidence and your use of runcastle@1.4.4 before allowing it. Restrict the permissions described in this report.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
Evidence last updated: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.