yakuza0 (npm) · Malicious Code
Affects yakuza0Source GCVE Database
Malicious package : remove yakuza0 and rotate any secrets on hosts that installed it.
Data as of 7 Aug 2026, 15:20 UTC
Malicious package
Published to npm · OSV MAL-2026-13605
What to do
Remove yakuza0 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 |
|---|---|---|
| npmyakuza0 | Affected
| Fixed in– |
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Description
The yakuza0 npm package versions 2.23.40 and 2.23.40-beta.3 contain malicious code that performs outbound network calls to a hardcoded, non-standard host. The code includes runtime fingerprinting of the host environment and uses shell command execution combined with HTTP requests to attacker-controlled endpoints. This behavior indicates potential exfiltration of data and remote command execution risks.