bcs-compact (npm) · Malicious Code
Affects bcs-compactSource GCVE Database
Malicious package : remove bcs-compact and rotate any secrets on hosts that installed it.
Data as of 14 Aug 2026, 16:36 UTC
Malicious package
Published to npm · OSV MAL-2026-13925
What to do
Remove bcs-compact from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| npmbcs-compact | Affected– | Fixed in– |
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Description
--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (85b93f1a0694dc37c94e18c12eb32ebe9cab96ded318e46ee5c774db80f4a648) On require('bcs-compact'), index.js runs a self-scrubbing IIFE that reads the installer's Sui wallet keystore at ~/.sui/sui.keystore, ~/.sui/sui_config/*.yaml, and any.env* files containing SUI_/PK_B64/PRIVATE_KEY markers, base64-encodes their contents, and PUTs them to api.github.com/repos/futongwan/sui-research-notes/contents/fingerprints/... using a hardcoded GitHub personal access token. The destination host (api.github.com), repository slug (futongwan/sui-research-notes), and Bearer token are reconstructed at runtime via an XOR routine keyed on the string 'bcs-c0mpact-v10' to hide them from static inspection. After exfiltration the payload rewrites index.js on disk to remove the /* compat-probe:start */.../* compat-probe:end */ block so the installed file no longer contains the malicious code on subsequent inspection. The package is presented as a BCS codec; the exfiltration and anti-forensics behavior have no relationship to that stated purpose. ## Source: ghsa-malware (26785e267ea5dbbb1a77bd9745feb4eed05a2579f8855af25bacd40264a837e4) 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.