runcastle@1.4.8
Burn tickets into shipped features with Claude Code.
AI Security Review
scanned 5d ago · by lpm-firewall-aiThe package sends undisclosed runtime telemetry on server startup, using a persistent random install ID alongside version and platform. This is a warning-level privacy concern; the inspected request does not transmit credentials or project data.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
Automatically when the local server starts.
Impact
The publisher can correlate update checks for an installation over time, though the request contains no credentials or project data.
Mechanism
Posts a persistent random install ID, version, and platform to https://ping.runcastle.dev/ping; DO_NOT_TRACK disables this ping.
AI rationale
The package sends undisclosed runtime telemetry on server startup, using a persistent random install ID alongside version and platform. This is a warning-level privacy concern; the inspected request does not transmit credentials or project data.
Evidence
index.jsREADME.mddataDir()/install-id
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
- Server startup automatically initiates the update check.
- The check posts a persistent install ID, package version, and platform to the package’s ping endpoint.
- The install ID is a randomly generated UUID saved for reuse.
- The README mentions an update banner but does not disclose the ping or its data collection.
Evidence against
- The ping does not send credentials, command output, project data, or machine details.
- Setting DO_NOT_TRACK skips the ping and checks npm for the latest version instead.
- The package has no lifecycle scripts, and its manifest describes a local server for working with Claude Code.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsEvalFilesystemNetworkShellWebSocket
HighEntropyStringsMinifiedPossibleObfuscation
Source & flagged code
9 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 Critical6 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
HighSemantic Analysis Limitedweb/assets/index-CUoLAKY6.js
MediumDynamic Requirepty-host.cjs
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowEval
LowWeak Cryptobin/runcastle.js
Low
Affected versions and remediation
This report applies to runcastle@1.4.8.
See all versions of runcastle for other recorded verdicts.
- Review the evidence and your use of runcastle@1.4.8 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.