@exulu/backend@3.7.0
**Exulu IMP** (Intelligence Management Platform) is an open-source TypeScript framework for building production-ready AI agent applications. It provides the backend infrastructure for managing agents, semantic search contexts, background job processing, a
AI Security Review
scanned 2mo ago · by lpm-firewall-aiThe source does not support the scanner's claim of a fixed credential redirect or foreign package overwrite. It does establish a dangerous runtime capability: remotely supplied skills may execute directly with inherited secrets when sandboxing is unavailable.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
A configured skill session is created on a host where the sandbox cannot run and EXULU_REQUIRE_SANDBOX is not set.
Impact
A configured or compromised skill can run with the backend process's permissions and access inherited environment values.
Mechanism
Remote skill download followed by direct Bash execution on sandbox failure.
AI rationale
The source does not support the scanner's claim of a fixed credential redirect or foreign package overwrite. It does establish a dangerous runtime capability: remotely supplied skills may execute directly with inherited secrets when sandboxing is unavailable.
Evidence
package.jsonscripts/postinstall.cjsee/python/setup.shdist/chunk-HA2ZSGOW.jsdist/chunk-4PDWNVNT.jsee/python/.venv
Decision evidence
public snapshotAI called this Suspicious at 90.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- Installation automatically runs a bundled Python setup script that creates a virtual environment and installs Python dependencies.
- At runtime, the package downloads configured skill artifacts from S3 storage and writes them into a session directory.
- If the sandbox probe fails and the operator has not opted into a required sandbox, skill commands execute directly through Bash.
- Directly executed skill commands inherit configured variables and the process environment, exposing host-level capabilities and secrets to invoked skills.
Evidence against
- No fixed unofficial credential gateway was found; the credential submit URL is derived from the operator-supplied BACKEND environment variable.
- The reviewed install script acts only on the package's bundled Python environment and does not modify foreign packages or AI-agent configuration.
- No source evidence showed stealthy persistence, destructive behavior, or an install-time remote payload fetch.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsUrlStrings
NoLicenseWildcardDependency
Source & flagged code
13 flaggedpackage.jsonView file
•scripts.preinstall = node -e "if (process.version !== 'v22.18.0') { console.error('❌ Wrong Node.js version. Expected v22.18.0, got ' + process.version); process.exit(1); }"
Critical
Red Install Lifecycle Script
Install-time lifecycle script matches a deterministic static-gate block pattern.
package.jsonView on unpkg•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 unpkgbin/backend.cjsView file
9L10: const { spawn } = require('child_process');
L11: const { existsSync } = require('fs');
High
dist/chunk-HA2ZSGOW.jsView file
5727import { promisify } from "util";
L5728: var execAsync = promisify(exec);
L5729: var REQUIRED_SYSTEM_DEPENDENCIES = [
High
•stage = ast_semantic_analysis; reason = ast_alias_growth_limit_exceeded; limitedFiles = 1
High
Semantic Analysis Limited
A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.
dist/chunk-HA2ZSGOW.jsView on unpkgdist/index.jsView file
•matchType = previous_version_dangerous_delta
matchedPackage = @exulu/backend@3.6.0
matchedIdentity = npm:QGV4dWx1L2JhY2tlbmQ:3.6.0
similarity = 0.981
summary = stored previous version shares package body but lacks this dangerous source file
Critical
Previous Version Dangerous Delta
This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.
dist/index.jsView on unpkg•Manifest-reachable source captures an API credential, sends it to a fixed unofficial gateway, and persists that redirection in agent or shell configuration.
dist/index.js:
(req.headers["authorization"] || req.headers["x-api-key"]) ?? ""
const { baseUrl, authHeaders } = resolveLiteLLMTarget();
const endpoint = `${baseUrl}/v1/embeddings`;
// Optional attribution target for API keys (type "api"): tags requests
Some tools collect credentials (API keys, passwords, tokens) through a secure form shown directly to the user in the chat UI. Credentials are never entered in the conversation itse...
if (output && typeof output === "object" && output.oauth?.authorizationUrl) {
read them with the readFile tool. Files you produce yourself (via writeFile or via shell
this request (readFile, writeFile, bas
High
Credential Redirect Persistence
Manifest-reachable source sends a prompted API credential to a fixed unofficial gateway and persists the redirection.
dist/index.jsView on unpkg•Manifest-reachable source resolves another installed package, overwrites its runtime code, and injects package-defined remote behavior.
dist/index.js:
"Cannot have multiple types in the same job, must be one of the following: embedder, workflow, processor or eval."
description: `This tool calls an agent named: ${instance.name}. The agent does the following: ${instance.description ?? ""}.`,
Example: {url: https://www.google.com, title: Google, snippet: The result of the web search.}
read them with the readFile tool. Files you produce yourself (via writeFile or via shell
// assistant's response, no follow-up text turn is wanted (same
means: read its SKILL.md with the readFile tool, follow the instructions inside it, and run
this request (readFile, writeFile, bash, plus whatever else is regis
High
Entrypoint Foreign Package Code Overwrite
Manifest-reachable source overwrites another installed package with package-defined remote behavior.
dist/index.jsView on unpkg105var redisServer = {
L106: host: process.env.REDIS_HOST ?? "",
L107: port: process.env.REDIS_PORT ?? "",
...
L372: };
L373: var resolveLiteLLMConfigPath = () => process.env.LITELLM_CONFIG_PATH ?? resolve(process.cwd(), "./config.litellm.yaml");
L374: var parseEmbeddingModels = (configPath) => {
...
L530: contentType: type,
L531: metadata: {
L532: ...metadata,
...
L572: const text = this.encoder.decode(tokens);
L573: return new TextDecoder().decode(text);
L574: }
High
Command Output Exfiltration
Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.
dist/index.jsView on unpkg · L105105var redisServer = {
L106: host: process.env.REDIS_HOST ?? "",
L107: port: process.env.REDIS_PORT ?? "",
...
L372: };
L373: var resolveLiteLLMConfigPath = () => process.env.LITELLM_CONFIG_PATH ?? resolve(process.cwd(), "./config.litellm.yaml");
L374: var parseEmbeddingModels = (configPath) => {
...
L530: contentType: type,
L531: metadata: {
L532: ...metadata,
...
L572: const text = this.encoder.decode(tokens);
L573: return new TextDecoder().decode(text);
L574: }
Low
Weak Crypto
Package source references weak cryptographic algorithms.
dist/index.jsView on unpkg · L105ee/python/setup.shView file
•path = ee/python/setup.sh
kind = build_helper
sizeBytes = 10741
magicHex = [redacted]
Medium
Ships Build Helper
Package ships non-JavaScript build or shell helper files.
ee/python/setup.shView on unpkgee/python/transcription/tests/__init__.pyView file
•path = ee/python/transcription/tests/__init__.py
kind = payload_in_excluded_dir
sizeBytes = 0
High
Payload In Excluded Dir
Package hides binary, compressed, or executable-looking payloads in test/fixture/hidden paths.
ee/python/transcription/tests/__init__.pyView on unpkgFindings
2 Critical8 High6 Medium7 Low
CriticalRed Install Lifecycle Scriptpackage.json
CriticalPrevious Version Dangerous Deltadist/index.js
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processbin/backend.cjs
HighShelldist/chunk-HA2ZSGOW.js
HighCredential Redirect Persistencedist/index.js
HighEntrypoint Foreign Package Code Overwritedist/index.js
HighCommand Output Exfiltrationdist/index.js
HighPayload In Excluded Diree/python/transcription/tests/__init__.py
HighSemantic Analysis Limiteddist/chunk-HA2ZSGOW.js
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumNetwork
MediumEnvironment Vars
MediumShips Build Helperee/python/setup.sh
MediumStructural Risk Force Deep Review
MediumWildcard Dependency
LowNon Install Lifecycle Scripts
LowScripts Present
LowWeak Cryptodist/index.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
LowNo License
Affected versions and remediation
This report applies to @exulu/backend@3.7.0.
See all versions of @exulu/backend for other recorded verdicts.
- Review the evidence and your use of @exulu/backend@3.7.0 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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