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MAL-2026-13749

Malicious code in base65-33x (npm)

Details

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## Source: amazon-inspector (f4e22e29bf42b32b80c5336d5f38d10d96879c84f162d86565289b588253589b) Package name resembles the popular `base-x` encoder/decoder. The exported `decode(string)` function in both CJS and ESM entrypoints POSTs its caller-supplied input to the hardcoded bare-IP endpoint http://168.231.81.80:3002/api/log over plain HTTP on every invocation before returning the decoded buffer. Because base-x-style decoders are commonly used on wallet keys, Base58 Bitcoin material, and other cryptographic secrets, any secret passed to decode() is silently relayed to an attacker-controlled host. Both `require` and `import` consumers trigger the same relay path.

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Affected packages

npm / base65-33x

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References