registry / Malware / cloud-baileys / 1.1.39

cloud-baileys@1.1.39

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.

OpenSSF/OSV Malicious Advisory

imported 13d ago · by OpenSSF/OSV

OpenSSF/OSV advisory MAL-2026-17751 confirms this npm version as malicious.

Advisory

MAL-2026-17751

Source

OpenSSF Malicious Packages via OSV

Summary

Malicious code in cloud-baileys (npm)

Details

Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

References

OpenSSF/OSV advisory ADVISORY

Independent scan evidence

public snapshot

Behavioral surface

Source

ChildProcessCryptoEnvironmentVarsEvalFilesystemNetworkShellWebSocket

Supply chain

HighEntropyStringsMinifiedPossibleObfuscationUrlStrings

ManifestNo manifest risk signals triggered.

scanned 117 file(s), 2.93 MB of source, external domains: call.whatsapp.com, emscripten.org, fburl.com, mmg.whatsapp.net, raw.githubusercontent.com, web.whatsapp.com, www.internalfb.com, www.whatsapp.com

Oversized source lightweight scan

WAProto/index.js6.35 MB file, sampled 256 KB

No sampled risky behavior triggered.

Source & flagged code

11 flagged

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

lib/VoIP/worker-bootstrap.jsView file

346const code = fs.readFileSync(url, "utf8"); L347: eval(code); L348: }

Low

Eval

Package source references a known benign dynamic code generation pattern.

lib/VoIP/worker-bootstrap.jsView on unpkg · L346

lib/VoIP/wasm-engine.jsView file

17const __filename = fileURLToPath(import.meta.url); L18: const __dirname = path.dirname(__filename); L19: const CALL_WASM_AB_PROPS_JSON = process.env.CALL_WASM_AB_PROPS_JSON ?? ""; L20: const PTHREAD_POOL_SIZE = 20; ... L25: try { L26: const parsed = JSON.parse(raw); L27: if (parsed && typeof parsed === "object" && !Array.isArray(parsed)) ... L51: }; L52: const filterWorkerStderr = (chunk) => { L53: const line = chunk.toString().trim(); L54: if (line && !line.startsWith("voip:") && !line.startsWith("still waiting")) { L55: process.stderr.write(chunk);

Medium

Unsafe Vm Context

Package source executes code through a VM context API.

lib/VoIP/wasm-engine.jsView on unpkg · L17

lib/Utils/validate-connection.jsView file

104pull: false, L105: devicePairingData: { L106: buildHash: appVersionBuf, ... L131: const { details, hmac, accountType } = proto.ADVSignedDeviceIdentityHMAC.decode(deviceIdentityNode.content); L132: let hmacPrefix = Buffer.from([]); L133: if (accountType !== undefined && accountType === proto.ADVEncryptionType.HOSTED) { ... L155: ]); L156: account.deviceSignature = Curve.sign(signedIdentityKey.private, deviceMsg); L157: const identity = createSignalIdentity(lid, accountSignatureKey);

Low

Weak Crypto

Package source references weak cryptographic algorithms.

lib/Utils/validate-connection.jsView on unpkg · L104

lib/assets/wasm/whatsapp.wasmView file

•path = lib/assets/wasm/whatsapp.wasm kind = wasm_module sizeBytes = 9819554 magicHex = [redacted]

Medium

Ships Wasm Module

Package ships WebAssembly modules.

lib/assets/wasm/whatsapp.wasmView on unpkg

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

•stage = ast_semantic_analysis; reason = ast_path_work_budget_exceeded; limitedFiles = 4

High

Semantic Analysis Limited

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

WAProto/index.jsView on unpkg

•path = WAProto/index.js kind = oversized_source_file sizeBytes = 6656208 magicHex = [redacted]

Medium

Oversized Source File

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

WAProto/index.jsView on unpkg

lib/Utils/messages-media.jsView file

•matchType = previous_version_dangerous_delta matchedPackage = cloud-baileys@1.1.40 matchedIdentity = npm:Y2xvdWQtYmFpbGV5cw:1.1.40 similarity = 0.917 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

lib/WABinary/constants.d.tsView file

20patternName = google_api_key severity = high line = 20

High

Secret Pattern

Google API key in lib/WABinary/constants.d.ts

lib/WABinary/constants.d.tsView on unpkg · L20

Source & flagged code

11 flagged · loading source

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

lib/VoIP/worker-bootstrap.jsView file

346const code = fs.readFileSync(url, "utf8"); L347: eval(code); L348: }

Low

Eval

Package source references a known benign dynamic code generation pattern.

lib/VoIP/worker-bootstrap.jsView on unpkg · L346

Findings

5 High7 Medium6 Low

HighHigh Secretlib/WABinary/constants.js

HighSemantic Analysis LimitedWAProto/index.js

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

HighSecret Patternlib/WABinary/constants.js

HighSecret Patternlib/WABinary/constants.d.ts

MediumUnsafe Vm Contextlib/VoIP/wasm-engine.js

MediumNetwork

MediumEnvironment Vars

MediumShips Wasm Modulelib/assets/wasm/whatsapp.wasm

MediumShips Build HelperWAProto/GenerateStatics.sh

MediumOversized Source FileWAProto/index.js

MediumStructural Risk Force Deep Review

LowScripts Present

Affected versions and remediation

This report applies to cloud-baileys@1.1.39.

See all versions of cloud-baileys for other recorded verdicts.

Avoid installing cloud-baileys@1.1.39. 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: 2026-10-09 20:30:06.232Z (UTC).

Source advisory published: 2026-10-09 19:42:41.000Z (UTC).

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

OpenSSF/OSV Malicious Advisory

Independent scan evidence

Source & flagged code

Source & flagged code

Findings

Affected versions and remediation

Related packages

Other malware packages

Related packages

Other malware packages

Source & flagged code