agent-nervous-system-mcp@1.0.4
Shared context MCP for AI agents - append-only, zero config, auto-detect
AI Security Review
scanned 10h ago · by lpm-firewall-aiThe postinstall hook automatically modifies user-level configuration for several AI-agent clients without affirmative consent. This is 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
AI agents using the changed configs may load this package’s MCP server.
Mechanism
The hook checks for existing agent configs or their directories, adds a server entry, and writes the resulting config.
Policy narrative
Installing the package automatically runs a script that adds the package’s MCP server to detected user-level agent configuration files and writes those files without affirmative consent. This changes the configuration of multiple AI-agent clients and can cause them to load the package’s server.
AI rationale
The postinstall hook automatically modifies user-level configuration for several AI-agent clients without affirmative consent. This is unconsented install-time mutation of an AI-agent control surface.
Evidence
package.jsonscripts/postinstall.js~/.claude.json~/Library/Application Support/Claude/claude_desktop_config.json~/.config/claude/claude_desktop_config.json~/.cursor/mcp.json~/.config/opencode/opencode.json~/.codeium/windsurf/mcp_config.json~/.vscode/mcp.json~/.continue/config.json
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’s postinstall hook automatically runs scripts/postinstall.js.
- The script targets user-level configuration files for multiple AI agents and adds this package as an MCP server.
- When a target config exists or its directory exists, the script writes the modified config without an affirmative consent check.
Evidence against
Behavioral surface
Filesystem
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 unpkg13"postinstall": "node scripts/postinstall.js"
},
"keywords": ["mcp", "shared-context", "agent-memory", "ai", "common-
High
Suspicious Lifecycle Evidence
The package’s postinstall hook automatically runs scripts/postinstall.js.
package.jsonView on unpkg · L13•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
HighSuspicious Lifecycle Evidencepackage.json
HighAi Review Evidencescripts/postinstall.js
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@1.0.4.
See all versions of agent-nervous-system-mcp for other recorded verdicts.
- Avoid installing agent-nervous-system-mcp@1.0.4. 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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