halfcycle@0.4.6
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AI Security Review
scanned 12d ago · by lpm-firewall-aiThe default service destination is package-aligned and requests require user-invoked CLI operations, so the source does not establish a default credential theft attack. However, an unrestricted environment override can redirect existing bearer credentials, leaving a concrete conditional exposure that warrants a warning.
Static reason
One or more suspicious static signals were detected.; previous stored version diff introduced dangerous source
Trigger
A user invokes a CLI operation that makes an authenticated service request while HALFCYCLE_SERVICE_URL is configured.
Impact
The configured recipient could receive and misuse the Halfcycle token; the source does not establish that the default recipient is unrelated or that the token is sent there by default.
Mechanism
The CLI replaces the stored service URL with the environment value and sends the saved token as a bearer credential without checking the destination against an allowlist.
AI rationale
The default service destination is package-aligned and requests require user-invoked CLI operations, so the source does not establish a default credential theft attack. However, an unrestricted environment override can redirect existing bearer credentials, leaving a concrete conditional exposure that warrants a warning.
Evidence
dist/cli.jsdist/index.js
Network endpoints1
control.halfcycle.ai
Decision evidence
public snapshotAI called this Suspicious at 91.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The manifest exposes a library entry point and a CLI, with no install lifecycle hook listed.
- The CLI defaults to Halfcycle’s control host but accepts HALFCYCLE_SERVICE_URL from the environment without restricting its destination.
- The CLI can load HALFCYCLE_TOKEN from the environment or stored credentials and use the environment service URL in place of the stored URL.
- The CLI and library send bearer credentials to URLs built from the configured service URL.
- Invoking project, phase, and system commands reaches credentialed request callers.
Evidence against
- The default service recipient belongs to the Halfcycle product, and these requests are reached through user-invoked CLI operations rather than an automatic install hook.
Behavioral surface
ChildProcessCryptoEnvironmentVarsEvalFilesystemNetwork
HighEntropyStringsUrlStrings
Source & flagged code
6 flaggedbin/bin.bundle.mjsView file
15715// dist/git.js
L15716: import { spawnSync } from "node:child_process";
L15717: import { existsSync, readFileSync } from "node:fs";
High
Child Process
Package source references child process execution.
bin/bin.bundle.mjsView on unpkg · L15715dist/cli.jsView file
•matchType = previous_version_dangerous_delta
matchedPackage = halfcycle@0.4.5
matchedIdentity = npm:aGFsZmN5Y2xl:0.4.5
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.
dist/cli.jsView on unpkg3561// dist/control-origin.js
L3562: var DEFAULT_CONTROL_ORIGIN = "https://control.halfcycle.ai";
L3563: function resolveControlOrigin(env = process.env) {
L3564: const configured = env["HALFCYCLE_SERVICE_URL"]?.trim();
...
L3573: // dist/device-signin.js
L3574: import { spawn } from "node:child_process";
L3575: import { platform as platform3 } from "node:os";
Findings
1 Critical5 High3 Medium5 Low
CriticalPrevious Version Dangerous Deltadist/cli.js
HighChild Processbin/bin.bundle.mjs
HighSame File Env Network Executiondist/cli.js
HighSandbox Evasion Gated Capabilitydist/cli.js
HighCross File Remote Execution Contextdist/cli.js
HighRuntime Package Installdist/cli.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowEval
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Affected versions and remediation
This report applies to halfcycle@0.4.6.
See all versions of halfcycle for other recorded verdicts.
- Review the evidence and your use of halfcycle@0.4.6 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.