registry / Remote code execution / type-atob

type-atob

This document describes the management of vulnerabilities for the project and all modules within the organization.

This report shows the evidence for type-atob@3.3.7. 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 chain unrelated to the declared package purpose. It is runtime-triggered rather than lifecycle-triggered, but remains malicious.

Static reason

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

Trigger

Consumer calls the exported middleware function.

Impact

Remote operator can execute arbitrary code as the consuming application user.

Mechanism

Detached remote-payload download and dynamic code execution.

Attack narrative

`index.js` spawns detached `node lib/caller.js` with ignored stdio whenever the exported middleware is invoked. `lib/caller.js` requests a remote URL with a fixed header, reads `data.cookie`, compiles it with `new Function.constructor("require", s)`, and invokes it with Node's `require`. The server therefore controls executable code in the consuming application's context.

AI rationale

This is a concrete remote-code-execution chain unrelated to the declared package purpose. It is runtime-triggered rather than lifecycle-triggered, but remains malicious.

Evidence

package.jsonindex.jslib/caller.js

Network endpoints1

json.extendsclass.com/bin/49b93b00acf1

Decision evidence

public snapshot

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

Evidence for block

`index.js` launches detached `lib/caller.js` on middleware use.
`lib/caller.js` fetches a remote payload with Axios.
Remote `data.cookie` is executed via `Function.constructor`.
Payload receives Node `require`, enabling arbitrary local code execution.

Evidence against

`package.json` has no npm lifecycle hooks.
No AI-agent configuration mutation found in inspected files.

Behavioral surface

Source

ChildProcessEnvironmentVarsNetwork

Supply chain

HighEntropyStringsUrlStrings

ManifestNo manifest risk signals triggered.

scanned 17 file(s), 52.4 KB of source, external domains: github.com, json.extendsclass.com

Source & flagged code

2 flagged

index.jsView file

•matchType = malicious_source_fingerprint_signature signature = 2ad508fc9ea2882e signatureType = suspicious_hashes sourceLabel = final_verdict:malicious matchedPackage = type-elint@3.3.7 matchedPath = index.js matchedIdentity = npm:dHlwZS1lbGludA:3.3.7 similarity = 1.000 shingleOverlap = 12 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

docs/transports.mdView file

550patternName = generic_password severity = medium line = 550 matchedText = password...rd',

Medium

Secret Pattern

Hardcoded password in docs/transports.md

docs/transports.mdView on unpkg · L550

Source & flagged code

2 flagged · loading source

index.jsView file

High

Known Malware Source Fingerprint Signature

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

index.jsView on unpkg

docs/transports.mdView file

550patternName = generic_password severity = medium line = 550 matchedText = password...rd',

Medium

Secret Pattern

Hardcoded password in docs/transports.md

docs/transports.mdView on unpkg · L550

Findings

2 High3 Medium3 Low

HighEval

HighKnown Malware Source Fingerprint Signatureindex.js

MediumNetwork

MediumEnvironment Vars

MediumSecret Patterndocs/transports.md

LowScripts Present

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to type-atob@3.3.7.

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

Avoid installing type-atob@3.3.7. 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: 2026-07-10 21:01:53.626Z (UTC).

Source advisory published: 2026-07-10 18:35:43.000Z (UTC).

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

Versions

2 known versions

0.0.1-securitylatestClean—AllowPublishedJul 10, 2026, 8:33 PM 3.3.7shownMaliciousRemote Code ExecutionBlockPublishedJul 10, 2026, 3:30 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