@ubnt/cawcut@0.8.0

CawCut developer CLI — auth, generate, app run, task status

AI Security Review

scanned 6d ago · by lpm-firewall-ai

The inspected source supports a warning for automatic global agent skill setup during postinstall. Its global-install guard and package-associated skills reduce the evidence for a concrete attack, so a block is not justified.

Static reason

High-risk behavior combination matched malicious policy.; source matched previously finalized malicious package; routed for review

Trigger

Installing the package globally, unless setup is skipped or CI is detected.

Impact

The install can add package-associated instructions to the user’s agent environments without a separate setup command.

Mechanism

The postinstall hook launches the skills installer with automatic confirmation and targets global agent skill locations using the package’s public skills repository.

AI rationale

Evidence

package.jsondist/postinstall.jsdist/lib/is-global-install.jsdist/lib/skills-install.jsdist/lib/skills-agents.js

Network endpoints1

github.com

Decision evidence

public snapshot

AI called this Suspicious at 87.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The package runs a postinstall script that invokes setup code.
The hook installs skills only for a global install and can be skipped with the package’s setup-skip flag or in CI.
The setup launches the skills installer without prompting, targeting global agent skill directories for Cursor, Claude Code, and Codex.
The default skills source is the package’s public GitHub repository.

Evidence against

The hook returns for non-global installs, and the setup-skip flag and CI check provide ways to suppress it.
The inspected behavior installs package-associated skills; it does not establish credential theft, private-content export, or remote code execution.

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

Source & flagged code

6 flagged

package.jsonView file

Lines 1-40json

2 "name": "@ubnt/cawcut",

3 "version": "0.8.0",

4 "description": "CawCut developer CLI \u2014 auth, generate, app run, task status",

5 "type": "module",

6 "bin": {

7 "cawcut": "dist/index.js"

8 },

9 "main": "dist/index.js",

10 "files": [

11 "dist",

12 "config",

13 "assets"

14 ],

15 "scripts": {

16 "build:ts": "node scripts/build.mjs",

17 "build": "npm run build:ts",

18 "build:internal": "node scripts/build.mjs --profile internal",

19 "prepare": "npm run build",

20 "postinstall": "node dist/postinstall.js",

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L20

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg · L20

21 "reinstall:global": "npm uninstall -g @ubnt/cawcut && npm install -g . --foreground-scripts --allow-scripts=@ubnt/cawcut",

22 "test": "vitest run",

23 "verify:package": "node scripts/verify-npm-package.mjs",

24 "release:check": "npm run test && npm run build && npm run verify:package",

25 "prepublishOnly": "node scripts/assert-release-ci.mjs && npm run release:check"

26 },

27 "dependencies": {

28 "commander": "^13.1.0"

29 },

30 "devDependencies": {

31 "@types/node": "^22.15.0",

32 "typescript": "^5.8.3",

33 "vitest": "^3.1.4"

34 },

35 "engines": {

36 "node": ">=20"

37 },

38 "license": "MIT"

39}

dist/lib/vn-media.jsView file

Lines 1-21javascript

1import { createHash } from "node:crypto";

2import { execFile } from "node:child_process";

3import { copyFile, mkdir, open, readFile, stat } from "node:fs/promises";

Low

Weak Crypto

Package source references weak cryptographic algorithms.

dist/lib/vn-media.jsView on unpkg · L1

dist/lib/skills-agents.jsView file

Lines 1-21javascript

1import { existsSync } from "node:fs";

2import { homedir } from "node:os";

Critical

Ai Agent Control Hijack

Source creates an unconsented AI-agent control surface through install-time mutation or a default unauthenticated remote skill channel.

dist/lib/skills-agents.jsView on unpkg · L1

3import { join } from "node:path";

dist/lib/vn-pack.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 2

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

dist/lib/vn-pack.js#virtual:normalized:round1View on unpkg

dist/lib/is-global-install.jsView file

•matchType = normalized_sha256 matchedPackage = @ubnt/cawcut@0.1.5 matchedPath = dist/lib/is-global-install.js matchedIdentity = npm:QHVibnQvY2F3Y3V0:0.1.5 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

dist/lib/is-global-install.jsView on unpkg

Source & flagged code

6 flagged · loading source

package.jsonView file

•scripts.postinstall = node dist/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node dist/postinstall.js

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

dist/lib/vn-media.jsView file

1import { createHash } from "node:crypto"; L2: import { execFile } from "node:child_process"; L3: import { copyFile, mkdir, open, readFile, stat } from "node:fs/promises"; ... L419: async function probeWithPlatformTool(filePath) { L420: if (process.platform === "darwin") { L421: try { L422: const { stdout } = await execFileAsync("/usr/bin/afinfo", [filePath], { timeout: 10_000 }); L423: const match = stdout.match(/estimated duration:\s*([\d.]+)\s*sec/i);

Low

Weak Crypto

Findings

1 Critical3 High4 Medium6 Low

CriticalAi Agent Control Hijackdist/lib/skills-agents.js

HighInstall Time Lifecycle Scriptspackage.json

HighSemantic Analysis Limiteddist/lib/vn-pack.js#virtual:normalized:round1

HighKnown Malware Source Similaritydist/lib/is-global-install.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumNetwork

MediumEnvironment Vars

MediumStructural Risk Force Deep Review

LowNon Install Lifecycle Scripts

LowScripts Present

LowWeak Cryptodist/lib/vn-media.js

LowFilesystem

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to @ubnt/cawcut@0.8.0.

See all versions of @ubnt/cawcut for other recorded verdicts.

Review the evidence and your use of @ubnt/cawcut@0.8.0 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: 2026-10-17 02:52:14.828Z (UTC).

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