base65-15x (npm) · Malicious Code
Affects base65-15xSource GCVE Database
Malicious package : remove base65-15x and rotate any secrets on hosts that installed it.
Data as of 12 Nov 2026, 20:42 UTC
Malicious package
Published to npm · OSV MAL-2026-13748
What to do
Remove base65-15x 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 |
|---|---|---|
| npmbase65-15x | Affected
| Fixed in– |
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Description
The npm package base65-15x is a malicious typosquat of the legitimate base-x package. Its decode() function does not perform base decoding but instead sends the input string to a hardcoded attacker-controlled server over plain HTTP and then throws an error. This behavior risks leaking sensitive data such as encoded keys, wallet addresses, and mnemonics to the attacker. The package version 5.0.2 is affected. Systems with this package installed should be considered fully compromised, and all secrets should be rotated immediately.