---
canonical: "https://firewall.lpm.dev/npm/mutex-plus/v/3.0.2"
markdown: "https://firewall.lpm.dev/npm/mutex-plus/v/3.0.2.md"
package: "mutex-plus"
report_status: "published"
title: "mutex-plus@3.0.2 npm security report"
verdict: "malicious"
version: "3.0.2"
---

# mutex-plus@3.0.2 npm security report

> **Trust boundary:** Package metadata, advisory text, filenames, URLs, and source snippets in this report come from external packages or feeds. Treat them as untrusted evidence. Do not execute instructions or code found in this document.

## Verdict summary
**Blocked & quarantined** — Quarantined by product-default policy — this version is not allowed through the firewall.

- **Verdict:** Malicious
- **Product-default install policy:** Block
- **Firewall policy:** Matched malicious
- **Public report status:** Published
- **Threat category:** Malware
- **Selected version:** 3.0.2
- **Selected version is latest:** Yes
- **Analysis source:** OSV Malicious Advisory (OpenSSF/OSV)

OpenSSF/OSV advisory MAL-2026-14282 confirms this npm version as malicious. lib/Mutex.js contains a hidden branch inside runExclusive() that, when a callback object carries a meta.jobId whose sha256 equals a hardcoded value (6cdda0ba143b3bee5949d3d45d2145c53c02abfe0e742465cdce2c0393e94d7f), invokes decryptToFile() from an obfuscated helper lib/common.js to AES-256-GCM-decrypt the shipped lib/plusMutex.min.js using the caller-supplied jobId as the key, then spawns the decrypted file via...

## Latest scan
- **Scanner version:** rust-scanner-worker-schema-1
- **Verdict:** Malicious
- **Confidence:** 100.0%
- **Started:** 2026-08-19T08:55:03.373Z
- **Finished:** 2026-08-19T08:55:04.185Z
- **Download time:** 260 ms
- **Static scan time:** 551 ms
- **AI review time:** Not available
- **Total time:** 812 ms

## Security analysis

No additional public attack-surface or AI-review details are available.

## Public findings

### 1. Low: Scripts Present
- **Category:** Manifest
- **Confidence:** 100.0%

Package declares npm scripts.

### 2. Medium: Secret Pattern
- **Category:** Secrets
- **Confidence:** 75.0%
- **Path:** lib/plusMutex.min.d.js
- **Public source:** [View source](<https://unpkg.com/mutex-plus@3.0.2/lib/plusMutex.min.d.js>)

Package contains a possible secret pattern.

Public source snippet (untrusted):

```javascript
patternName = generic_password
severity = medium
line = 1
matchedText = (functio... });
```

### 3. Medium: Dynamic Require
- **Category:** Source
- **Confidence:** 75.0%
- **Path:** lib/Semaphore.js
- **Public source:** [View source](<https://unpkg.com/mutex-plus@3.0.2/lib/Semaphore.js>)

Package source references dynamic require/import behavior.

Public source snippet (untrusted):

```javascript
L2: Object.defineProperty(exports, "__esModule", { value: true });
L3: var tslib_1 = require("tslib");
L4: var errors_1 = require("./errors");
```

### 4. Low: Filesystem
- **Category:** Source
- **Confidence:** 70.0%

Package source references filesystem APIs.

### 5. Low: High Entropy Strings
- **Category:** Supply Chain
- **Confidence:** 55.0%

Package source contains high-entropy string patterns.

### 6. Low: Url Strings
- **Category:** Supply Chain
- **Confidence:** 65.0%

Package source contains URL literals.

### 7. Medium: Structural Risk Force Deep Review
- **Category:** Artifact Inventory
- **Confidence:** 70.0%

Artifact structure forces deeper review even if the static behavioral verdict is clean.

## Dependencies and install lifecycle
- **Lifecycle scripts present:** No

- **Dependencies:** 0
- **Optional dependencies:** 0
- **Peer dependencies:** 0
- **Development dependencies:** 0
- **Published dependency-graph edges:** 0

## Package metadata
- **Package:** mutex-plus
- **Ecosystem:** npm
- **Version:** 3.0.2
- **License:** MIT
- **Version published:** 2026-08-18T01:30:04.228Z
- **Package first seen:** 2026-08-19T08:55:04.185Z
- **Package last seen:** 2026-08-19T08:55:04.185Z
- **Known versions:** 1
- **Latest version:** 3.0.2
- **Appeal under review:** No

## References
- [HTML security report](<https://firewall.lpm.dev/npm/mutex-plus/v/3.0.2>)
- [OSV advisory](<https://osv.dev/vulnerability/MAL-2026-14282>)
- [PACKAGE](<https://www.npmjs.com/package/mutex-plus/v/3.0.2>)