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Malicious code in dopc-client (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.

Affected packages

  • RubyGems dopc-client

    Affected
    >= 1.0.0, <= 1.0.0>= 10.0.0, <= 10.0.0
    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 (0ecbe68fef68472dcc1e9778859b71dcba31c06e8db799d75bb95c013f6ab1da) On `require 'dopc-client'`, lib/dopc-client.rb issues a plaintext HTTP GET to the hardcoded bare IP 38.242.235.206 at path /depconf/dopc-client/require with query parameters carrying the installer's OS username (ENV['USER']), hostname (Socket.gethostname), and current working directory (Dir.pwd). The call fires as a top-level side effect of loading the gem, errors are swallowed, and the destination is a plaintext bare IP unrelated to any declared publisher infrastructure. Inline comments and the gemspec description frame the call as a 'benign beacon' / 'defensive placeholder'; the author-controlled self-label does not change the observed behavior — installer-identifying fields are shipped to a third-party endpoint the caller did not configure or opt into.

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

    Published from osv record MAL-2026-18518

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-2026-18518

Advisory: Malicious code in dopc-client (RubyGems)
IDs: mal-2026-18518
Record: https://patchnext.com/advisories/mal-2026-18518 (revision 1, source checked 4 Nov 2026, 06:30 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 dopc-client: affected >= 1.0.0, <= 1.0.0; >= 10.0.0, <= 10.0.0

## Suggested inspection (read-only)
- RubyGems dopc-client: 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 dopc-client.
- 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-2026-18518 (OSV record MAL-2026-18518 lists affected ranges: RubyGems dopc-client >=1.0.0 =10.0.0 <=10.0.0)

Commands are suggestions: review each one before running it.

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