@chemx/starter-kit@26.9.25-1337
Chemical X Protocol: Private drop-in architecture starter kit and capsule generator
AI Security Review
scanned 11d ago · by lpm-firewall-aiThe package's postinstall hook automatically writes behavior-bearing MCP configuration into consumer AI-tool settings without a consent guard. This meets the policy for blocking unconsented install-time mutation of an AI-agent control surface.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Installing the package runs its postinstall hook.
Impact
The consumer's AI tools gain a configured Chemical X server that can launch the package CLI or an npm-executed chemx command.
Mechanism
The hook calls the MCP installer, which writes server configuration to Cursor and VS Code settings and may update the user's Antigravity configuration when present.
Policy narrative
Installation automatically writes MCP server entries into consumer AI-tool configuration without asking for consent. Those entries can launch the package CLI or use npm exec to run chemx, establishing an unconsented AI-agent control surface change.
AI rationale
The package's postinstall hook automatically writes behavior-bearing MCP configuration into consumer AI-tool settings without a consent guard. This meets the policy for blocking unconsented install-time mutation of an AI-agent control surface.
Evidence
package.jsoncli/postinstall.jscli/mcp/installer.js
Decision evidence
public snapshotAI identified this as a dangerous AI-agent capability at 99.0% confidence with low false-positive risk.
Evidence for policy risk
- The package runs cli/postinstall.js automatically after installation.
- The postinstall hook calls installAllMcpConfigs for the consumer project without a consent check.
- The installer writes MCP server configuration into Cursor and VS Code project settings and registers a server command.
- The server configuration can invoke the local CLI or run chemx through npm exec; the setup also registers with Antigravity when its config directory exists.
Evidence against
Behavioral surface
ChildProcessEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsUrlStrings
Source & flagged code
10 flagged · loading sourcepackage.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 unpkgcli/errors/errors.spec.jsView file
27patternName = github_pat
severity = critical
line = 27
Critical
Critical Secret
Package contains a critical-looking secret pattern.
cli/errors/errors.spec.jsView on unpkg · L27Findings
3 Critical5 High5 Medium5 Low
CriticalCritical Secretcli/errors/errors.spec.js
CriticalAi Agent Control Hijackcli/mcp/installer.js
CriticalSecret Patterncli/errors/errors.spec.js
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processcli/audit-preflight-git.js
HighShellcli/build/executor.js
HighSame File Env Network Executioncli/license.js
HighTrigger Reachable External Ai Agent Control Surface Mutationcli/pillars-wizard.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumNetwork
MediumEnvironment Vars
MediumShips Build Helperscripts/pre-commit.sh
Affected versions and remediation
This report applies to @chemx/starter-kit@26.9.25-1337.
See all versions of @chemx/starter-kit for other recorded verdicts.
- Avoid installing @chemx/starter-kit@26.9.25-1337. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.