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MAL-2026-10079: Malicious code in vybscan-testbed-obfuscated-postinstall (npm)

0
Unknown
Published: 07/09/2026 (07/09/2026, 15:45:29 UTC)
Source: GCVE Database
Product: vybscan-testbed-obfuscated-postinstall

Description

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (cf9aee5b150e0606b1c5c2469fdab43496965a3dd5664df288d68d618e326567) package.json declares a postinstall lifecycle script that runs `node -e "eval(Buffer.from('<base64>','base64').toString())"`. Installing the package triggers execution of code that is not visible in the package source and is only materialized at install time by decoding an opaque literal. In this specific version the decoded blob is an inert console.log, but the mechanism — obfuscated-then-eval'd bytes wired into a lifecycle hook — is the canonical install-time remote-code-execution shape and has no legitimate use: it lets whoever controls the package substitute arbitrary code at install without changing readable source. The package's self-description as a testbed fixture does not neutralize the pattern; the same install-time hook would execute whatever bytes were placed in the base64 literal.

Affected software

npmghsa
vybscan-testbed-obfuscated-postinstall
Affected versions
=1.0.0

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Gcve Source
db.gcve.eu
Osv Id
MAL-2026-10079
Osv Schema Version
1.7.4
Aliases
[]
Ecosystems
["npm"]
Database Specific Severity
null
Cvss Version
null

Threat ID: 6a50baad68715ace4358583b

Added to database: 07/10/2026, 09:26:05 UTC

Last updated: 07/10/2026, 09:26:05 UTC

Views: 1

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