@chem-x/starter-kit@26.10.4-235
Chemical X Protocol: Private drop-in architecture starter kit and capsule generator
AI Security Review
scanned 11d ago · by lpm-firewall-aiThe manifest's postinstall hook reaches consumer-project MCP configuration writes without an explicit opt-in. This is an unconsented install-time mutation of AI-agent control surfaces and meets the blocking policy.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Installing the package through npm, which runs its postinstall lifecycle script.
Impact
Consumer agent configurations are modified and can launch the package's MCP server.
Mechanism
The lifecycle script targets the consumer project and calls an installer that writes Cursor MCP configuration and attempts to register Antigravity MCP configuration.
Policy narrative
The package's install hook immediately registers its MCP server in consumer AI-agent settings. The code does not ask for consent before writing the project Cursor configuration or attempting global Antigravity registration, creating an unconsented agent control surface during installation.
AI rationale
The manifest's postinstall hook reaches consumer-project MCP configuration writes without an explicit opt-in. This is an unconsented install-time mutation of AI-agent control surfaces and meets the blocking policy.
Evidence
package.jsoncli/postinstall.jscli/mcp/installer.js
Decision evidence
public snapshotAI identified this as a dangerous AI-agent capability at 98.0% confidence with low false-positive risk.
Evidence for policy risk
- The package manifest runs a postinstall script during installation.
- The postinstall script targets the consumer project and invokes the MCP installer without a consent check.
- The installer writes MCP server configuration into the consumer's Cursor settings and also attempts Antigravity configuration.
- The installer registers MCP configuration for both the project and Antigravity; the writes are not gated on an explicit user action.
Evidence against
Behavioral surface
ChildProcessEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsUrlStrings
Source & flagged code
11 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 Critical6 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
HighSemantic Analysis Limitedcli/verify-lint.js#virtual:normalized:round1
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumNetwork
Medium
Affected versions and remediation
This report applies to @chem-x/starter-kit@26.10.4-235.
See all versions of @chem-x/starter-kit for other recorded verdicts.
- Avoid installing @chem-x/starter-kit@26.10.4-235. 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: .
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