registry / Credential exfiltration / @xayz/baileys / 6.1.9

@xayz/baileys@6.1.9

This package appears in our research on the malicious Baileys forks, with how it works, the full package list and what to do if you installed it.

AI Security Review

scanned 19d ago · by lpm-firewall-ai

Source proves conditional forwarding of a service-issued credential to unrestricted caller-configured upload destinations. This warrants a warning under the credential-forwarding policy, without evidence supporting a malware block.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review; previous stored version diff introduced dangerous source

Trigger

A caller configures customUploadHosts and sends media through the socket.

Impact

A configured unrelated host can receive the media authentication token and uploaded media.

Mechanism

The uploader combines custom hosts with service-provided hosts and sends the service token in the selected destination's URL query.

AI rationale

Evidence

lib/Socket/messages-send.jslib/Utils/messages-media.jslib/Socket/index.jslib/Defaults/index.js

Decision evidence

public snapshot

AI called this Suspicious at 96.0% confidence as Dangerous Capability with medium false-positive risk.

Evidence for warning

lib/Socket/messages-send.js obtains the media authentication token from WhatsApp's media connection response.
lib/Utils/messages-media.js prepends caller-configured upload hosts and embeds the service token in upload URLs without destination validation.
The Node HTTP upload sends that URL's query string in a POST request to the selected hostname.
Socket configuration accepts caller overrides, and message sending uses the configured uploader.
Custom upload hosts default to an empty array, so exposure requires caller configuration.

Evidence against

The inspected install hooks check the Node version and perform a package import and WhatsApp connectivity test.
No hidden recipient or automatic credential theft was established.

Behavioral surface

Source

ChildProcessCryptoDynamicRequireEnvironmentVarsFilesystemNetworkWebSocket

Supply chain

HighEntropyStrings

Source & flagged code

11 flagged

package.jsonView file

•scripts.postinstall = node ./scripts/self-test.js || exit 0

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node ./scripts/self-test.js || exit 0

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

lib/WABinary/constants.jsView file

600patternName = google_api_key severity = high line = 600

High

High Secret

Package contains a high-severity secret pattern.

lib/WABinary/constants.jsView on unpkg · L600

600patternName = google_api_key severity = high line = 600

High

Secret Pattern

Google API key in lib/WABinary/constants.js

lib/WABinary/constants.jsView on unpkg · L600

scripts/self-test.jsView file

45try { L46: const mod = await import(path.join(packageRoot, 'lib', 'index.js')); L47: const ok = typeof mod.default === 'function';

Medium

Dynamic Require

Package source references dynamic require/import behavior.

scripts/self-test.jsView on unpkg · L45

lib/Utils/validate-connection.jsView file

107pull: false, L108: devicePairingData: { L109: buildHash: appVersionBuf, ... L134: const { details, hmac, accountType } = proto.ADVSignedDeviceIdentityHMAC.decode(deviceIdentityNode.content); L135: let hmacPrefix = Buffer.from([]); L136: if (accountType !== undefined && accountType === proto.ADVEncryptionType.HOSTED) { ... L158: ]); L159: account.deviceSignature = Curve.sign(signedIdentityKey.private, deviceMsg); L160: const identity = createSignalIdentity(lid, accountSignatureKey);

Low

Weak Crypto

Package source references weak cryptographic algorithms.

lib/Utils/validate-connection.jsView on unpkg · L107

WAProto/GenerateStatics.shView file

•path = WAProto/GenerateStatics.sh kind = build_helper sizeBytes = 302 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

WAProto/GenerateStatics.shView on unpkg

WAProto/index.jsView file

•path = WAProto/index.js kind = oversized_source_file sizeBytes = 8586314 magicHex = [redacted]

Medium

Oversized Source File

Package contains source files above the normal full-analysis size ceiling.

WAProto/index.jsView on unpkg

lib/Utils/business.jsView file

•stage = ast_semantic_analysis; reason = ast_alias_growth_limit_exceeded; limitedFiles = 5

High

Semantic Analysis Limited

A bounded semantic-analysis stage reached its safety limit; remaining detectors completed, but this package requires AI review.

lib/Utils/business.jsView on unpkg

lib/antiban.jsView file

•matchType = normalized_sha256 matchedPackage = my-baileys@1.0.2 matchedPath = lib/antiban.js matchedIdentity = npm:bXktYmFpbGV5cw:1.0.2 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

lib/antiban.jsView on unpkg

lib/Utils/messages-media.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = @xayz/baileys@6.1.8 matchedIdentity = npm:QHhheXovYmFpbGV5cw:6.1.8 similarity = 0.942 summary = stored previous version shares package body but lacks this dangerous source file

High

Previous Version Dangerous Delta

This package version adds a dangerous source file absent from the previous stored version; route for source-aware review.

lib/Utils/messages-media.jsView on unpkg

Source & flagged code

11 flagged · loading source

package.jsonView file

•scripts.postinstall = node ./scripts/self-test.js || exit 0

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node ./scripts/self-test.js || exit 0

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

lib/WABinary/constants.jsView file

600patternName = google_api_key severity = high line = 600

High

High Secret

Package contains a high-severity secret pattern.

lib/WABinary/constants.jsView on unpkg · L600

Findings

6 High7 Medium6 Low

HighInstall Time Lifecycle Scriptspackage.json

HighHigh Secretlib/WABinary/constants.js

HighSemantic Analysis Limitedlib/Utils/business.js

HighKnown Malware Source Similaritylib/antiban.js

HighPrevious Version Dangerous Deltalib/Utils/messages-media.js

HighSecret Patternlib/WABinary/constants.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumDynamic Requirescripts/self-test.js

MediumNetwork

MediumEnvironment Vars

MediumShips Build HelperWAProto/GenerateStatics.sh

MediumOversized Source FileWAProto/index.js

Medium

Affected versions and remediation

This report applies to @xayz/baileys@6.1.9.

See all versions of @xayz/baileys for other recorded verdicts.

Review the evidence and your use of @xayz/baileys@6.1.9 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: 2026-10-03 22:28:29.469Z (UTC).

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