vybscan-testbed-obfuscated-postinstall (npm) · Malicious Code
Affects vybscan-testbed-obfuscated-postinstallSource GCVE Database
Malicious package : remove vybscan-testbed-obfuscated-postinstall and rotate any secrets on hosts that installed it.
Data as of 26 Oct 2026, 15:56 UTC
Malicious package
Published to npm · OSV MAL-2026-10079
What to do
Remove vybscan-testbed-obfuscated-postinstall 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 |
|---|---|---|
| npmvybscan-testbed-obfuscated-postinstall | Affected
| Fixed in– |
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Description
The npm package 'vybscan-testbed-obfuscated-postinstall' version 1.0.0 contains a postinstall lifecycle script that executes obfuscated code decoded from a base64 string. Although the current decoded payload is inert (a console.log), the mechanism allows arbitrary code execution at install time by evaluating hidden code. This pattern is a known vector for install-time remote code execution and poses a security risk if the base64 payload is modified. No official patch or remediation guidance is provided.