testing-d3do (npm) · Malicious Code
Affects testing-d3doSource GCVE Database
Malicious package : remove testing-d3do and rotate any secrets on hosts that installed it.
Data as of 10 Jul 2026, 10:08 UTC
Malicious package
Published to npm · OSV MAL-2026-10006
What to do
Remove testing-d3do 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 |
|---|---|---|
| npmtesting-d3do | Affected
| Fixed in– |
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Description
The npm package 'testing-d3do' version 99.9.9 contains malicious code that executes during installation. Its postinstall script collects host identifiers including hostname, user information, current working directory, and external IPv4 address, then sends this data to a hardcoded subdomain under oast.fun, an out-of-band interaction collector commonly used for reconnaissance. The package appears to be a dependency-confusion squat, using an unrealistically high version number and minimal metadata to masquerade as a legitimate package. This behavior exposes sensitive environment information to an attacker-controlled server.