@exulu/backend@5.5.0
**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 16d ago · by lpm-firewall-aiThe manifest activates a postinstall routine that mutates a hoisted dependency in the consumer's installation, creating a limited compatibility risk. The reviewed gateway and agent integration hints do not establish credential theft or install-time agent control changes.
Static reason
High-risk behavior combination matched malicious policy.; previous stored version diff introduced dangerous source
Trigger
Installing @exulu/backend runs its postinstall hook.
Impact
Other packages using the removed hoisted dependency may lose xz compression support or fail on code paths that require it.
Mechanism
The hook searches ancestor directories for node_modules/node-liblzma and recursively removes the first copy found unless an environment variable preserves it.
AI rationale
The manifest activates a postinstall routine that mutates a hoisted dependency in the consumer's installation, creating a limited compatibility risk. The reviewed gateway and agent integration hints do not establish credential theft or install-time agent control changes.
Evidence
package.jsonscripts/postinstall.cjsnode_modules/node-liblzma
Decision evidence
public snapshotAI called this Suspicious at 90.0% confidence as Dangerous Capability with medium false-positive risk.
Evidence for warning
- package.json runs scripts/postinstall.cjs automatically during installation.
- The postinstall routine walks parent directories and recursively deletes a hoisted node_modules/node-liblzma directory unless EXULU_KEEP_NODE_LIBLZMA=true.
- That deletion runs before the Python setup skip checks, including when SKIP_PYTHON_SETUP is set.
- The agent integration locations list skill directories; they do not establish install-time agent configuration changes.
- The ai.open.de occurrence is an example URL in skill documentation, not evidence of a credential recipient.
Evidence against
- The postinstall hook also runs the package's Python setup script, and the script offers skip controls for that setup.
- The deletion is limited to the named optional dependency, but it can affect a copy hoisted for other consumers.
Behavioral surface
ChildProcessCryptoEnvironmentVarsFilesystemNetworkShell
HighEntropyStringsUrlStrings
NoLicenseWildcardDependency
Source & flagged code
12 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.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); }"
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-ZWFL6YUH.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-ZWFL6YUH.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-ZWFL6YUH.jsView on unpkg · L43dist/index.jsView file
•matchType = previous_version_dangerous_delta
matchedPackage = @exulu/backend@5.4.0
matchedIdentity = npm:QGV4dWx1L2JhY2tlbmQ:5.4.0
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"]) ?? ""
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 unpkg224var redisServer = {
L225: host: process.env.REDIS_HOST ?? "",
L226: port: process.env.REDIS_PORT ?? "",
...
L433: // src/exulu/markdown-export.ts
L434: import { execFile } from "child_process";
L435: import { mkdtemp, readFile, rm, writeFile } from "fs/promises";
...
L1126: item_name: chunk2.item_name,
L1127: chunk_metadata: chunk2.metadata
L1128: }));
...
L1625: try {
L1626: parsed = JSON.parse(value);
L1627: } catch {
High
Command Output Exfiltration
Source combines command execution, command-output handling, and outbound requests; review data flow before blocking.
dist/index.jsView on unpkg · L224ee/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
2 Critical7 High6 Medium7 Low
CriticalRed Install Lifecycle Scriptpackage.json
CriticalPrevious Version Dangerous Deltadist/index.js
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-ZWFL6YUH.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-ZWFL6YUH.js
LowFilesystem
LowHigh Entropy Strings
LowUrl Strings
LowNo License
Affected versions and remediation
This report applies to @exulu/backend@5.5.0.
See all versions of @exulu/backend for other recorded verdicts.
- Review the evidence and your use of @exulu/backend@5.5.0 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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