---
id: "GHSA-v8w4-68hj-hmqq"
page: "https://infrastack.ai/live/GHSA-v8w4-68hj-hmqq"
kind: "package"
aliases: ["GHSA-v8w4-68hj-hmqq", "MAL-2026-13750"]
title: "Malicious code in base65-77x (npm)"
severity: "critical"
cvss: null
epss: null
exploited: false
status: "open"
category: "package"
products: [{"name": "base65-77x", "fixed": [], "affected": "= 5.0.2", "ecosystem": "npm"}]
ecosystems: ["npm"]
tags: ["malicious", "package"]
not_affected_if: []
published_at: "2026-08-11T18:49:32+00:00"
first_seen_at: "2026-11-12T20:09:49+00:00"
updated_at: "2026-11-12T20:10:13+00:00"
sources: [{"source": "osv-malicious", "url": "https://osv.dev/vulnerability/MAL-2026-13750", "first_seen_at": "2026-11-12T20:09:49+00:00"}]
exploit_sources: []
---

# Malicious code in base65-77x (npm)

Link for people: https://infrastack.ai/live/GHSA-v8w4-68hj-hmqq (this .md is for agents)

## Affected

- npm:base65-77x affected = 5.0.2 fixed no fixed version listed

## Timeline

- 2026-11-12T20:09:49+00:00 osv-malicious https://osv.dev/vulnerability/MAL-2026-13750

## From the sources

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_-= Per source details. Do not edit below this line.=-_

## Source: amazon-inspector (ef76e83f2641fcfacf488a6ef61447fac81f6a24cff6287b407a385374b9ddf7)
The package impersonates base-x (name, description, keywords, and homepage copied from base-x) and patches the advertised decode() function in both the CommonJS and ESM entrypoints to POST the caller-supplied input string to a hardcoded remote destination at http://46.250.253.63:3000/api/log over plain HTTP before returning the decoded result. Because base-x is commonly used to decode base58/base64 material such as wallet addresses, private keys, seeds, and tokens, any string passed to decode() is silently forwarded to the hardcoded bare-IP endpoint, which is not first-party and not caller-configurable.

## Source: ghsa-malware (8476c58c609651710f5bd70861d91200e69f221cd5ae03c0cd2f92b6b9bd5b61)
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_