agent-nervous-system-mcp@2.0.0
Shared context MCP for AI agents - append-only, zero config, auto-detect
AI Security Review
scanned 3h ago · by lpm-firewall-aiThe postinstall hook mutates detected agent configurations without consent in non-interactive environments. This supports blocking under the AI-agent control-surface policy.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
Package installation runs the postinstall hook; when stdin is not a TTY, the hook selects all detected agents.
Impact
Agent configurations are changed during installation, enabling this package's server in those agents.
Mechanism
The hook adds an MCP server entry to detected agent configurations and writes the modified files.
Policy narrative
Installation automatically runs the setup script. In non-interactive mode, it selects all detected agents and writes an MCP server entry into their configuration files, without asking the user to approve those changes. This is an unconsented install-time mutation of AI-agent control surfaces.
AI rationale
The postinstall hook mutates detected agent configurations without consent in non-interactive environments. This supports blocking under the AI-agent control-surface policy.
Evidence
package.jsonscripts/postinstall.js~/.claude.json~/.cursor/mcp.json~/.config/opencode/opencode.json~/.vscode/mcp.json
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
- package.json runs scripts/postinstall.js automatically during installation.
- In non-interactive mode, the installer selects every detected agent without asking the user.
- The installer detects agent configuration files across the user's home directory.
- It adds this package as an MCP server in those agent configurations.
- It writes the modified configurations to disk.
Evidence against
- Interactive mode asks which agents to configure.
Behavioral surface
ChildProcessFilesystemShell
HighEntropyStrings
Source & flagged code
7 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node scripts/postinstall.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg14"postinstall": "node scripts/postinstall.js"
},
"keywords": ["mcp", "shared-context", "agent-memory", "ai", "common-context"],
"author
High
Suspicious Lifecycle Evidence
package.json runs scripts/postinstall.js automatically during installation.
package.jsonView on unpkg · L14•scripts.postinstall = node scripts/postinstall.js
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgscripts/postinstall.jsView file
Findings
1 Critical5 High2 Medium4 Low
CriticalAi Agent Control Hijackscripts/postinstall.js
HighInstall Time Lifecycle Scriptspackage.json
HighPrevious Version Dangerous Deltascripts/postinstall.js
HighSuspicious Lifecycle Evidencepackage.json
HighAi Review Evidencescripts/postinstall.js
HighAi Review Evidencescripts/postinstall.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumStructural Risk Force Deep Review
LowNon Install Lifecycle Scripts
LowScripts Present
LowFilesystem
LowHigh Entropy Strings
Affected versions and remediation
This report applies to agent-nervous-system-mcp@2.0.0.
See all versions of agent-nervous-system-mcp for other recorded verdicts.
- Avoid installing agent-nervous-system-mcp@2.0.0. 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.