nebula-notebook@0.2.47
AI-native notebook computing environment — real Jupyter kernels, real filesystem, built to be driven by agents (Claude Code / Codex) via MCP
AI Security Review
scanned 2mo ago · by lpm-firewall-aiThe install hook is inert for registry consumers, but the runtime remote-agent flow writes an authentication token through SSH. That is a real, user-invoked agent capability with no evidence of covert exfiltration or install-time compromise.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
An authenticated user invokes the remote-agent launch flow that calls the push-token API.
Impact
A token is persisted on the configured remote machine, expanding the package's agent-control capability if that flow is used.
Mechanism
SSH delivery of an authentication token to a local agent credential file.
AI rationale
The install hook is inert for registry consumers, but the runtime remote-agent flow writes an authentication token through SSH. That is a real, user-invoked agent capability with no evidence of covert exfiltration or install-time compromise.
Evidence
node-server/dist/terminal/server.jsnode-server/dist/terminal/remote-agent-identity.js.nebula/token
Network endpoints1
localhost
Decision evidence
public snapshotAI called this Suspicious at 86.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- The package declares a postinstall hook whose checkout-only branch runs npm install.
- A runtime API forwards the caller's bearer token over SSH and writes it to a remote .nebula/token file.
Evidence against
- The postinstall script exits when installed under node_modules, so the registry install path does not run its nested npm installs.
- The SSH token operation validates port, username, and token shape and is invoked by a remote-agent API rather than automatically at installation.
- No source evidence showed secret exfiltration, remote payload download, or mutation of third-party AI-agent configuration.
Behavioral surface
ChildProcessCryptoEnvironmentVarsEvalFilesystemNetworkShellWebSocket
HighEntropyStringsMinifiedPossibleObfuscationUrlStrings
Source & flagged code
9 flaggedpackage.jsonView file
•scripts.postinstall = node scripts/postinstall.cjs
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node scripts/postinstall.cjs
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgdist/assets/index-D7GWSc_e.jsView file
826patternName = generic_password
severity = medium
line = 826
Medium
Secret Pattern
Package contains a possible secret pattern.
dist/assets/index-D7GWSc_e.jsView on unpkg · L826Findings
1 Critical6 High5 Medium5 Low
CriticalPrevious Version Dangerous Deltanode-server/dist/index.js
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processbin/nebula-notebook.js
HighShell
HighCross File Remote Execution Contextbin/nebula-notebook.js
HighRuntime Package Installscripts/postinstall.cjs
HighSemantic Analysis Limiteddist/assets/index-BYLhtrxB.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumSecret Patterndist/assets/index-D7GWSc_e.js
MediumNetwork
MediumEnvironment Vars
MediumStructural Risk Force Deep Review
LowScripts Present
Affected versions and remediation
This report applies to nebula-notebook@0.2.47.
See all versions of nebula-notebook for other recorded verdicts.
- Review the evidence and your use of nebula-notebook@0.2.47 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: .
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