@exulu/backend@5.4.0
**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 17d ago · by lpm-firewall-aiThe install-time deletion of a hoisted dependency creates a concrete but scoped risk, so this warrants a warning rather than a block. The inspected credential and agent setup paths did not establish a separate attack.
Static reason
High-risk behavior combination matched malicious policy.
Trigger
Installing the package with its postinstall hook enabled.
Impact
Software relying on the removed package may lose its xz compression support or fail where that dependency is expected.
Mechanism
The hook searches up to six parent levels for node_modules/node-liblzma and recursively removes the first match. An environment setting can preserve the dependency.
AI rationale
The install-time deletion of a hoisted dependency creates a concrete but scoped risk, so this warrants a warning rather than a block. The inspected credential and agent setup paths did not establish a separate attack.
Evidence
package.jsonscripts/postinstall.cjsnode_modules/node-liblzma
Decision evidence
public snapshotAI called this Suspicious at 86.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- package.json runs scripts/postinstall.cjs during postinstall.
- The hook searches upward for node_modules/node-liblzma and recursively deletes the first match; the search can reach ancestor directories.
- The deletion runs before the hook’s early return, and the documented environment setting only opts out of deletion.
- The agent skill directories are listed in the bundle, and a separate HTTP route serves a bootstrap archive when requested.
- Credential submission uses the BACKEND environment setting to form its destination; this does not establish a fixed publisher gateway.
Evidence against
- The deletion is limited to node-liblzma and the source describes it as an optional dependency; an environment setting can preserve it.
- The agent bootstrap route serves package-generated files on request; the inspected code does not connect it to npm installation.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsUrlStrings
NoLicenseWildcardDependency
Source & flagged code
11 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
bin/setup-python.cjsView file
13L14: const execAsync = promisify(exec);
L15:
High
dist/chunk-CWSP2WOQ.jsView file
•stage = ast_semantic_analysis; reason = ast_alias_growth_limit_exceeded; limitedFiles = 4
High
Semantic Analysis Limited
A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.
dist/chunk-CWSP2WOQ.jsView on unpkg43// src/exulu/litellm/supervisor.ts
L44: import { spawn } from "child_process";
L45: import { existsSync } from "fs";
...
L62: };
L63: var isLiteLLMEnabled = () => process.env.EXULU_USE_LITELLM === "true";
L64: var resolveConfig = (packageRoot) => {
...
L67: const masterKey = process.env.LITELLM_MASTER_KEY;
L68: const configPath = process.env.LITELLM_CONFIG_PATH ?? resolve(process.cwd(), "./config.litellm.yaml");
L69: const venvBin = resolve(packageRoot, "ee/python/.venv/bin");
...
L75: var pollHealth = async (host, port) => {
L76: const url = `http://${host}:${port}/health/liveliness`;
L77: const deadline = Date.now() + READY_TIMEOUT_MS;
Low
Weak Crypto
Package source references weak cryptographic algorithms.
dist/chunk-CWSP2WOQ.jsView on unpkg · L43dist/index.jsView file
•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"]) ?? ""
import { mkdtemp, readFile, rm, writeFile } from "fs/promises";
await writeFile(mdPath, markdown, "utf-8");
await writeFile(docxPath, docxBytes);
var recallPublicBaseUrl = () => (process.env.BACKEND || process.env.PUBLIC_API_BASE_URL)?.replace(/\/$/, "");
var recallEnabled = () => recallRegion() !== null && !!recallApiKey() && !!recallVerificationSecret() && !!recallPublicBaseUrl();
var recallApiBaseUrl = () => {
const base = recallPublicBaseUrl();
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 unpkg210var redisServer = {
L211: host: process.env.REDIS_HOST ?? "",
L212: port: process.env.REDIS_PORT ?? "",
...
L419: // src/exulu/markdown-export.ts
L420: import { execFile } from "child_process";
L421: import { mkdtemp, readFile, rm, writeFile } from "fs/promises";
...
L895: const teams = rbacRecords.filter((r) => r.access_type === "Team")?.map((r) => ({ id: r.team_id, rights: r.rights }));
L896: let type = rights_mode || "private";
L897: if (type === "users" && users.length === 0) type = "private";
...
L1226: item_name: chunk2.item_name,
L1227: chunk_metadata: chunk2.metadata
L1228: }));
High
Command Output Exfiltration
Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.
dist/index.jsView on unpkg · L210ee/python/setup.shView file
•path = ee/python/setup.sh
kind = build_helper
sizeBytes = 13359
magicHex = [redacted]
Medium
Ships Build Helper
Package ships non-JavaScript build or shell helper files.
ee/python/setup.shView on unpkgee/python/transcription/tests/test_server.pyView file
•path = ee/python/transcription/tests/test_server.py
kind = payload_in_excluded_dir
sizeBytes = 3264
magicHex = [redacted]
High
Payload In Excluded Dir
Package hides binary, compressed, or executable-looking payloads in test/fixture/hidden paths.
ee/python/transcription/tests/test_server.pyView on unpkgFindings
1 Critical7 High6 Medium7 Low
CriticalRed Install Lifecycle Scriptpackage.json
HighInstall Time Lifecycle Scriptspackage.json
HighChild Processbin/backend.cjs
HighShellbin/setup-python.cjs
HighCredential Redirect Persistencedist/index.js
HighCommand Output Exfiltrationdist/index.js
HighPayload In Excluded Diree/python/transcription/tests/test_server.py
HighSemantic Analysis Limiteddist/chunk-CWSP2WOQ.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/chunk-CWSP2WOQ.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
LowNo License
Affected versions and remediation
This report applies to @exulu/backend@5.4.0.
See all versions of @exulu/backend for other recorded verdicts.
- Review the evidence and your use of @exulu/backend@5.4.0 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: .
Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.