registry / Remote code execution / async-mutex-lock

async-mutex-lock

A lightweight async mutex lock utility for Node.js that provides class-based mutex instances to synchronize asynchronous tasks and prevent race conditions.

This report shows the evidence for async-mutex-lock@5.3.1. 1 of 2 known versions is blocked or flagged. The newest version, 0.0.1-security, is allowed. See all versions.

AI Security Review

scanned 3mo ago · by lpm-firewall-ai

This is a concrete remote-code-execution loader unrelated to the documented mutex functionality. Lack of lifecycle hooks does not mitigate execution when the exported API is called.

Static reason

One or more suspicious static signals were detected.; source fingerprint signature matched known malicious package; routed for review

Trigger

A consumer imports the package and invokes its default export.

Impact

Remote code execution in the consuming application's Node process.

Mechanism

Remote payload fetch followed by Function-based execution.

Attack narrative

The advertised mutex package instead exports getPlugin. On invocation it retrieves JSON from a hard-coded IP address, takes data.credits, compiles it with new Function, and executes it with require, process, global, Buffer, timers, and module context. The remote server can therefore supply arbitrary Node.js code to run in the caller's process.

AI rationale

This is a concrete remote-code-execution loader unrelated to the documented mutex functionality. Lack of lifecycle hooks does not mitigate execution when the exported API is called.

Evidence

package.jsonindex.jsREADME.md

Network endpoints1

31.97.137.157:45000/icons/108

Decision evidence

public snapshot

AI called this Malicious at 99.0% confidence as Malware with low false-positive risk.

Evidence for block

index.js:106-119 builds and fetches https://31.97.137.157:45000/icons/108.
index.js:127-152 passes remote JSON field data.credits to new Function.
index.js:156-170 executes that remote code with require, process, global, Buffer, and module access.
index.js:7-63 creates a custom require that can resolve project and sibling-package modules.
README.md describes a mutex API, but index.js exports the remote loader instead.

Evidence against

package.json has no preinstall, install, or postinstall hook.
No local credential harvesting or file writes are present in the inspected source.

Behavioral surface

Source

EvalNetwork

Supply chainNo supply-chain packaging signals triggered.

ManifestNo manifest risk signals triggered.

scanned 1 file(s), 5.94 KB of source

Source & flagged code

2 flagged

index.jsView file

149// Note: The code uses async/await, so we need to handle that L150: const evalFn = new Function( L151: 'require', 'module', 'exports', '__dirname', '__filename', 'console', 'process', 'global', 'Buffer', 'setTimeout', 'setInterval', 'clearTimeout', 'clearInterval', 'Promise',

High

Eval

Package source references dynamic code evaluation.

index.jsView on unpkg · L149

•matchType = malicious_source_fingerprint_signature signature = c06bd55d669269cb signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = poly-provider-api@4.6.1 matchedPath = index.js matchedIdentity = npm:cG9seS1wcm92aWRlci1hcGk:4.6.1 similarity = 1.000 shingleOverlap = 1 summary = package final verdict is malicious

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

index.jsView on unpkg

Source & flagged code

2 flagged · loading source

index.jsView file

High

Eval

Package source references dynamic code evaluation.

index.jsView on unpkg · L149

High

Known Malware Source Fingerprint Signature

Source fingerprint signature matches a known malicious package signature; route for source-aware review.

index.jsView on unpkg

Findings

2 High1 Medium1 Low

HighEvalindex.js

HighKnown Malware Source Fingerprint Signatureindex.js

MediumNetwork

LowScripts Present

Affected versions and remediation

This report applies to async-mutex-lock@5.3.1.

The versions list below shows the verdict for each recorded version.

Avoid installing async-mutex-lock@5.3.1. Remove it from direct dependencies and check your lockfile for transitive copies.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.
If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.

Evidence last updated: 2026-08-05 13:10:04.000Z (UTC).

Source advisory published: 2026-08-05 13:10:04.000Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.

Versions

2 known versions

0.0.1-securitylatestClean—AllowPublishedAug 5, 2026, 1:15 PM 5.3.1shownMaliciousRemote Code ExecutionBlockPublishedJul 22, 2026, 2:50 PM

AI Security Review

Decision evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Versions

Related packages

Other remote code execution packages

Behavioral surface

Source & flagged code

Related packages

Other remote code execution packages