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Malicious code in hd-wallet-generator (RubyGems)

What to do

Vendor response not established. Follow the primary source's mitigation guidance and check back for a fix.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

  • RubyGems hd-wallet-generator

    Affected
    >= 0.9.1, <= 0.9.1
    Fixed in
    no fixed version recorded

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
not scored
EPSS
No dated EPSS signal available.
Source description

As published by the source; long descriptions are shortened.

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

Source: amazon-inspector (5d6925082b6aa5db29d0569324b4485976add2368c78635d4be5c52270ee3771) The gem's declared native extension build script ext/hd_wallet_generator/extconf.rb executes a Base64-encoded payload via eval() during `gem install`. The decoded payload opens a TCP socket to the hardcoded remote host 45.138.12.177:8089 and pipes /bin/sh over it (TCPSocket.new + IO.popen(['/bin/sh'],'r+') + IO.copy_stream), granting a remote operator an interactive shell on the installer's host. Execution is wrapped in a double-forked, detached child with a 20–40 minute sleep to decorrelate the connection from the install event. The payload runs only when a battery of evasion checks pass: no CI environment variables, hostname does not match sandbox/firecracker/vagrant/uvm patterns, username does not match generated/analyst patterns (uA\d+, sandbox, tester, analys, scanner), cwd is not under /tmp or /opt/rubygems, machine uptime…

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 1 · created ·

    Published from osv record MAL-2026-17789

Agent brief

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# Patch Next advisory brief: mal-2026-17789

Advisory: Malicious code in hd-wallet-generator (RubyGems)
IDs: mal-2026-17789
Record: https://patchnext.com/advisories/mal-2026-17789 (revision 1, source checked 23 Oct 2026, 22:04 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Unrated
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor response not established. A vendor fix does not mean a deployment is fixed.

## Affected components
- RubyGems hd-wallet-generator: affected >= 0.9.1, <= 0.9.1

## Suggested inspection (read-only)
- RubyGems hd-wallet-generator: check the installed version with your package manager.

## Supported action
No complete vendor fix is recorded. Follow the primary source's mitigation guidance and check this record again before closing anything.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on hd-wallet-generator.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/MAL-2026-17789 (OSV record MAL-2026-17789 lists affected ranges: RubyGems hd-wallet-generator >=0.9.1 <=0.9.1)

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