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catalyst-os@3.9.0: Suspicious npm security report (Warn) | LPM Firewall

registry / catalyst-os / 3.9.0

catalyst-os@3.9.0

AI-native spec-driven development framework for Claude Code, Pi, and Codex

AI Security Review

scanned 11d ago · by lpm-firewall-ai

LPM treats this as warn-only first-party agent extension lifecycle risk. On npm install, postinstall runs the package installer. In CI, and when stdin closes without a TTY choice, it selects Claude Code and copies this package's agent, command, skill, and rule files into the consumer project's harness directory, overwriting an existing agents folder, and it also writes AGENTS.md and a .gitignore entry.

Static reason

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

Trigger

npm postinstall, or running the catalyst-os bin, when CI is set or the harness prompt is not answered.

Impact

A dependency install can replace the project's Claude, Pi, or Codex agent instructions with this package's framework files without an explicit harness choice.

Mechanism

install() resolves the harness to claude by default, then installHarness copies bundled .claude content into process.cwd() under .claude, .pi, or .codex and refreshes any harness that already has an agents directory.

AI rationale

The package's own postinstall writes its framework into the consumer project's Claude, Pi, and Codex control directories, and CI or a closed stdin selects Claude without a prompt. That is first-party agent setup tied to the install lifecycle, with a TTY prompt and no separate theft or remote-execution chain.

Evidence

package.json.catalyst/bin/install.js.claude/agents.claude/commands.claude/skills.claude/rules.pi/agents.codex/agentsAGENTS.md.gitignore.catalyst/secrets.local.yaml

Source & flagged code

10 flagged · loading source

package.jsonView file

•scripts.postinstall = node .catalyst/bin/install.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node .catalyst/bin/install.js

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

5"postinstall": "node .catalyst/bin/install.js", "validate": "node .catalyst/bin/validate-artifacts.js", "test":

Medium

Suspicious Lifecycle Evidence

The npm postinstall script runs node .catalyst/bin/install.js, and that file calls install() as soon as it loads.

package.jsonView on unpkg · L5

.catalyst/bin/install.jsView file

34name: 'Claude Code', L35: dir: '.claude', L36: commandsDir: 'commands', ... L46: name: 'OpenAI Codex', L47: dir: '.codex', L48: commandsDir: 'prompts', ... L111: console.log(` ${yellow}? Which AI coding harness do you use?${reset}`); L112: console.log(` ${cyan}1)${reset} Claude Code ${dim}(.claude/)${reset} ${dim}[default]${reset}`); L113: console.log(` ${cyan}2)${reset} Pi ${dim}(.pi/)${reset}`); L114: console.log(` ${cyan}3)${reset} OpenAI Codex ${dim}(.codex/)${reset}`); L115: console.log(` ${cyan}4)${reset} All ${dim}(Claude Code + Pi + Codex)${reset}\n`); ... L155: /**

Critical

Ai Agent Control Hijack

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

.catalyst/bin/install.jsView on unpkg · L34

•Manifest-trigger-reachable source links an external AI-agent control path to a behavior-bearing write operation. code', 'claudecode'].includes(val)) return 'claude'; if (['2', 'pi'].includes(val)) return 'pi'; if (['3', 'codex', 'openai', 'openai-codex'].includes(val)) return 'codex'; if (['4', 'all', 'both', 'every'].includes(val)) return 'all'; return null; } async function resolveharness(cliharness) { if (cliharness) { const normalized = normalizeharness(cliharness); if (normalized) return normalized; console.log(` ${yellow}warning:${reset} unknown harness '${cliharness}'. defaulting to claude code.\n`); return 'claude'; } if (process.en

High

Trigger Reachable External Ai Agent Control Surface Mutation

Manifest-trigger-reachable source writes behavior-bearing configuration into a user or project AI-agent control surface.

.catalyst/bin/install.jsView on unpkg

•matchType = normalized_sha256 matchedPackage = catalyst-os@3.10.0 matchedPath = .catalyst/bin/install.js matchedIdentity = npm:Y2F0YWx5c3Qtb3M:3.10.0 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.

.catalyst/bin/install.jsView on unpkg

•matchType = malicious_source_fingerprint_signature signature = 86cbee9394a9829a signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = catalyst-os@3.10.0 matchedPath = .catalyst/bin/install.js matchedIdentity = npm:Y2F0YWx5c3Qtb3M:3.10.0 similarity = 1.000 shingleOverlap = 2 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

.catalyst/bin/install.jsView on unpkg

102// If in CI, default to Claude Code immediately if (process.env.CI) { return 'claude'; } return new Promise((resolve) => { let resolved = false

Medium

Ai Review Evidence

When CI is set, harness selection returns claude with no prompt; a closed non-interactive stdin also falls through to claude.

.catalyst/bin/install.jsView on unpkg · L102

437// Run installation install();

Medium

Ai Review Evidence

When CI is set, harness selection returns claude with no prompt; a closed non-interactive stdin also falls through to claude.

.catalyst/bin/install.jsView on unpkg · L437

.catalyst/bin/install.js#virtual:normalized:round1View file

•stage = ast_semantic_analysis; reason = ast_parse_error; limitedFiles = 1

High

Semantic Analysis Limited

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

.catalyst/bin/install.js#virtual:normalized:round1View on unpkg