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Malicious code in dex-router-abis (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 dex-router-abis

    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 (a8f8b62993678b4f720468a05ef91f6fdcc864dd6be78d1ffc6bd14125f18d8f) The gem's extconf.rb (executed automatically during `gem install`) decodes a base64-encoded Ruby payload and executes it via a double-forked, detached process that sleeps 20-40 minutes before opening a TCP reverse shell from /bin/sh to the hardcoded remote host 45.138.12.177:8089. Execution is gated by environment checks that look for CI/sandbox/analysis indicators and probe for developer-secret artifacts (~/.ssh, ~/.gitconfig, ~/.gem/credentials, ~/.npmrc, ~/.bundle) so the payload fires only on real developer workstations with credentials present. The create_makefile stub in extconf.rb is a cover: no matching native source exists in the gem tree, and README/metadata identify the package as 'bitcoin-rpc-lite' (makefile target bitcoin_rpc_lite_native) while the published gem name is dex-router-abis, indicating a reused dropper…

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

    Published from osv record MAL-2026-17784

Agent brief

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: mal-2026-17784

Advisory: Malicious code in dex-router-abis (RubyGems)
IDs: mal-2026-17784
Record: https://patchnext.com/advisories/mal-2026-17784 (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 dex-router-abis: affected >= 0.9.1, <= 0.9.1

## Suggested inspection (read-only)
- RubyGems dex-router-abis: 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 dex-router-abis.
- 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-2026-17784 (OSV record MAL-2026-17784 lists affected ranges: RubyGems dex-router-abis >=0.9.1 <=0.9.1)

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