runcastle@1.2.12
Burn tickets into shipped features with Claude Code.
AI Security Review
scanned 5d ago · by lpm-firewall-aiThe automatic startup update check sends a persistent install ID, version, and platform to the package’s ping service. This is limited runtime telemetry, but the README only describes the update banner and does not disclose the ping, so it warrants a warning rather than a block.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
Automatically when the server starts.
Impact
The service can associate repeated update checks with one installation; no credential or project-data collection was identified in this flow.
Mechanism
The update check posts the saved or newly generated UUID, package version, and platform to https://ping.runcastle.dev/ping.
AI rationale
The automatic startup update check sends a persistent install ID, version, and platform to the package’s ping service. This is limited runtime telemetry, but the README only describes the update banner and does not disclose the ping, so it warrants a warning rather than a block.
Evidence
index.jsinstallIdPath() target
Network endpoints2
ping.runcastle.devregistry.npmjs.org
Decision evidence
public snapshotAI called this Suspicious at 91.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- Server startup automatically starts the update check.
- The update ping sends a persistent install ID, package version, and platform to ping.runcastle.dev.
- The install ID is generated as a UUID and saved locally.
- The README mentions an in-app update banner but does not disclose the startup ping or its transmitted fields.
Evidence against
- The transmitted fields are limited to an install ID, version, and platform; no credentials or project data are sent in this request.
- The package’s documented purpose is to launch a local server and provide an in-app update banner.
Behavioral surface
ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkShellWebSocket
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 = 0.600
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 unpkg1141// src/pty/kill-tree.ts
L1142: import { spawn } from "child_process";
L1143: function taskkillTree(pid) {
High
Child Process
Package source references child process execution.
bin/runcastle.jsView on unpkg · L11411073if (/\.(cmd|bat)$/i.test(resolved)) {
L1074: return { file: process.env.ComSpec ?? "cmd.exe", args: ["/c", resolved, ...args] };
L1075: }
High
Findings
1 Critical5 High4 Medium4 Low
CriticalPrevious Version Dangerous Deltabin/runcastle.js
HighChild Processbin/runcastle.js
HighShellbin/runcastle.js
HighSame File Env Network Executionbin/runcastle.js
HighCredential Redirect Persistenceindex.js
HighCross File Remote Execution Contextbin/runcastle.js
MediumDynamic Requirepty-host.cjs
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowWeak Cryptobin/runcastle.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to runcastle@1.2.12.
See all versions of runcastle for other recorded verdicts.
- Review the evidence and your use of runcastle@1.2.12 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.