registry / chemx / 26.10.8-344

chemx@26.10.8-344

Chemical X Protocol: Private drop-in architecture starter kit and capsule generator

AI Security Review

scanned 5d ago · by lpm-firewall-ai

The postinstall hook automatically changes project and agent MCP configuration, leaving a concrete extension lifecycle risk that warrants a warning. The inspected source shows first-party server registration, not a confirmed attack requiring a block.

Static reason

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

Trigger

The package’s npm postinstall hook runs in a consumer project.

Impact

Configured agents may load the package’s MCP tools when they read these configuration files; no additional permission grant or data transfer was established in the inspected source.

Mechanism

The hook calls the installer, which adds the package’s MCP server to project configuration and, when present, the user’s global Antigravity configuration.

AI rationale

Evidence

package.jsoncli/postinstall.jscli/mcp/installer.jscli/mcp/antigravity.js.cursor/mcp.json.vscode/mcp.json~/.gemini/config/mcp_config.json~/.gemini/antigravity/mcp/chemical-x/

Decision evidence

public snapshot

AI called this Suspicious at 88.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

The package manifest defines a postinstall hook that runs cli/postinstall.js.
The postinstall hook automatically calls installAllMcpConfigs for the installation target, except when installing inside the starter kit itself.
The installer writes an MCP server entry to the consumer project’s .cursor/mcp.json; the required installer location covers the start of this configuration path.
The Antigravity setup merges and writes a server entry to the user’s global MCP config when that config directory exists.
The registered server runs this package’s local MCP entrypoint when available, otherwise it invokes chemx mcp through npm exec; Antigravity also receives tool schemas and instructions.
The inspected behavior establishes automatic first-party agent configuration, but does not establish credential transfer, permission grants, or an unrelated payload.

Evidence against

Behavioral surface

Source

ChildProcessEnvironmentVarsFilesystemNetworkShell

Source & flagged code

14 flagged

package.jsonView file

•scripts.postinstall = node cli/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node cli/postinstall.js

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

cli/audit-preflight-git.jsView file

1import fs from 'node:fs'; L2: import { spawnSync } from 'node:child_process'; L3:

High

Child Process

Package source references child process execution.

cli/audit-preflight-git.jsView on unpkg · L1

cli/build/executor.jsView file

11const child = spawn(command, { L12: shell: true, L13: cwd,

High

Shell

Package source references shell execution.

cli/build/executor.jsView on unpkg · L11

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = cli/build/executor.js matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 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.

cli/build/executor.jsView on unpkg

cli/license.jsView file

3import os from 'node:os'; L4: import { spawnSync } from 'node:child_process'; L5: import { ... L17: L18: export const API_BASE = process.env.CHEMICAL_X_API_URL || 'https://chemicalx.xophz.com'; L19: export const GATEKEEPER_API_URL = process.env.COMPASS_GATEKEEPER_URL || 'https://mycompassconsulting.com/wp-json/compass/v1/gatekeeper';

High

Same File Env Network Execution

A single source file combines environment access, network access, and code or shell execution; review context before blocking.

cli/license.jsView on unpkg · L3

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = cli/license.js matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 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.

cli/license.jsView on unpkg

cli/mcp/installer.jsView file

1Install-time code directly mutates a foreign AI-agent control surface: L20: export const mergeMcpServerConfig = (existingJsonString = '', serverDef = {}) => { L21: let parsed = { mcpServers: {} }; L22: ... L30: L31: const hasMcpServersObject = Boolean(parsed.mcpServers && typeof parsed.mcpServers === 'object'); L32: if (!hasMcpServersObject) { L33: parsed.mcpServers = {}; L34: } L35: L36: parsed.mcpServers[SERVER_KEY] = serverDef; L37: return JSON.stringify(parsed, null, 2) + '\n'; ... L90: const cursorDir = path.join(resolvedTarget, '.cursor'); Write operation from cli/mcp/installer.js: L20: export const mergeMcpServerConfig = (existingJsonString = '', serverDef = {}) => { L21: let parsed = { mcpServers: {} }; L22: ... L30: L31: const hasMcpServersObject = Boolean(parsed.mcpServers &

Critical

Ai Agent Control Hijack

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

cli/mcp/installer.jsView on unpkg · L1

scripts/pre-commit.shView file

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = scripts/pre-commit.sh matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 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.

scripts/pre-commit.shView on unpkg

•path = scripts/pre-commit.sh kind = build_helper sizeBytes = 8215 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

scripts/pre-commit.shView on unpkg

cli/audit/ai-slop-detector.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.

cli/audit/ai-slop-detector.js#virtual:normalized:round1View on unpkg

cli/audit/social-git.jsView file

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = cli/audit/social-git.js matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 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.

cli/audit/social-git.jsView on unpkg

cli/errors/publisher.jsView file

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = cli/errors/publisher.js matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 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.

cli/errors/publisher.jsView on unpkg

cli/navigator-share.jsView file

•matchType = normalized_sha256 matchedPackage = create-chemx@26.10.4-235 matchedPath = cli/navigator-share.js matchedIdentity = npm:Y3JlYXRlLWNoZW14:26.10.4-235 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.

cli/navigator-share.jsView on unpkg

Source & flagged code

14 flagged · loading source

package.jsonView file

•scripts.postinstall = node cli/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node cli/postinstall.js

Medium

Ambiguous Install Lifecycle Script

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

package.jsonView on unpkg

cli/audit-preflight-git.jsView file

1import fs from 'node:fs'; L2: import { spawnSync } from 'node:child_process'; L3:

High

Child Process

Package source references child process execution.

cli/audit-preflight-git.jsView on unpkg · L1

Findings

1 Critical11 High5 Medium5 Low

CriticalAi Agent Control Hijackcli/mcp/installer.js

HighInstall Time Lifecycle Scriptspackage.json

HighChild Processcli/audit-preflight-git.js

HighShellcli/build/executor.js

HighSame File Env Network Executioncli/license.js

HighSemantic Analysis Limitedcli/audit/ai-slop-detector.js#virtual:normalized:round1

HighKnown Malware Source Similaritycli/audit/social-git.js

HighKnown Malware Source Similaritycli/license.js

HighKnown Malware Source Similaritycli/build/executor.js

HighKnown Malware Source Similaritycli/errors/publisher.js

HighKnown Malware Source Similaritycli/navigator-share.js

Affected versions and remediation

This report applies to chemx@26.10.8-344.

See all versions of chemx for other recorded verdicts.

Review the evidence and your use of chemx@26.10.8-344 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: 2026-10-18 09:22:53.192Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.