@factory/cli@0.211.0
Factory Droid CLI - AI-powered software engineering agent
AI Security Review
scanned 2mo ago · by lpm-firewall-aiThis is not evidence of credential theft, broad persistence, or agent-control mutation, but the automatic unverified native-binary fallback is a real supply-chain risk. The limited same-package shim migration warrants a warning rather than a block.
Static reason
One or more suspicious static signals were detected.
Trigger
Automatic npm postinstall when the platform optional dependency is unavailable.
Impact
A compromised or substituted registry response could supply code that runs during installation.
Mechanism
Registry download, executable write, and native binary version check.
AI rationale
This is not evidence of credential theft, broad persistence, or agent-control mutation, but the automatic unverified native-binary fallback is a real supply-chain risk. The limited same-package shim migration warrants a warning rather than a block.
Evidence
package.jsoninstall.jsbin/droidbin/droid.backupbin/droid.exe
Network endpoints1
registry.npmjs.org/
Decision evidence
public snapshotAI called this Suspicious at 86.0% confidence as Dangerous Capability with low false-positive risk.
Evidence for warning
- A postinstall hook runs automatically.
- If its optional native package is absent, the hook fetches a platform binary from the npm registry.
- The downloaded binary is written executable and later run with --version during installation.
- Redirected tarball downloads are accepted without checking npm dist integrity.
Evidence against
- The fallback selects only named @factory platform packages at the package's own version.
- Writes and link changes are limited to this package's bin directory.
- The command shim executes the selected platform binary only when the user invokes droid.
- No source code harvests files or credentials, modifies agent configuration, or contacts a non-registry host.
Behavioral surface
ChildProcessEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsUrlStrings
Source & flagged code
7 flaggedpackage.jsonView file
•scripts.postinstall = node install.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg9scripts.postinstall = node install.js
Install-time code downloads an unverified remote native executable, stages it locally, activates an executable path, and exposes it to process execution.
L9: *
L10: * Based on esbuild's approach: https://github.com/evanw/esbuild/pull/1621
L11: * and Sentry's guide: https://sentry.engineering/blog/publishing-binaries-on-npm
L12: *
...
L19: const path = require('path');
L20: const https = require('https');
L21: const zlib = require('zlib');
...
L27: getBinaryName,
L28: getBinaryPath,
L29: detectAVX2Support,
...
L50:
L51: function validateBinaryVersion(binaryPath) {
High
Unverified Remote Native Payload Install
Install-time source downloads a native archive from a fixed external host without transport verification, extracts it, and installs an executable payload.
package.jsonView on unpkg · L9•scripts.postinstall = node install.js
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
Findings
6 High4 Medium5 Low
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processinstall.js
HighShellinstall.js
HighSame File Env Network Executioninstall.js#virtual:normalized:round1
HighUnverified Remote Native Payload Installpackage.json
HighSemantic Analysis Limitedinstall.js#virtual:normalized:round1
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
Low
Affected versions and remediation
This report applies to @factory/cli@0.211.0.
See all versions of @factory/cli for other recorded verdicts.
- Review the evidence and your use of @factory/cli@0.211.0 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.