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Vulnerabilities

Vulnerability · MAL-2026-17796

Malicious code in staking-apr-fetcher (RubyGems)

Published Oct 11, 2026 · catalog updated Oct 13, 2026 · Malicious code in staking-apr-fetcher

Open the advisory

Exploitation likelihood is not on this record for MAL-2026-17796. A missing EPSS score is not a low risk. Compare Malicious code in staking-apr-fetcher with the linked advisory before you change production.

Gaps on this record

  • The stored product name is a package slug. The name on this page is taken from the title (Malicious code in staking-apr-fetcher).
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.
  • EPSS is missing. A missing score is not a low risk.
Severity
Unknown—
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
Awaiting synchronization with FIRST
Remediation
Not established
Affected products
RubyGems staking-apr-fetcher

--- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (405ab5b9651b8e8817ae91290042ec22673c5c99c1b58f45747e47cbb85aeacf) The gem declares a native extension whose build script (extconf.rb) decodes a base64-embedded Ruby payload and executes it via eval during . The payload double-forks a detached background process that opens a TCP connection to the hardcoded host 45.138.12.177:8089 and bidirectionally copies between that socket and a locally spawned /bin/sh, giving the operator of that endpoint interactive shell access on the installer's machine. Execution is gated by anti-analysis checks: the payload only fires when the environment does not look like CI, an ephemeral/sandbox VM (patterns matching uvm/firecracker/sandbox/vagrant), a generated analyst user (patterns matching uA\d+/sandbox/tester/analys/scanner), or a known analysis path (/opt/rubygems, /tmp/, /workspace/), and only when system uptime exceeds 1800 seconds and developer-identifying files exist (~/.ssh, ~/.gitconfig, ~/.gem/credentials, ~/.bundle, ~/.npmrc). The gem's advertised identity is a cover story: it is published as with a staking-related summary, but the README is titled , the extension's generated makefile is , no C sources are shipped for that native target, and the Ruby library (lib/staking_apr_fetcher.rb) is an inert stub defining only VERSION/build_id/healthy?. The package has no legitimate functionality; its sole purpose is to deliver the install-time backdoor. ## Source: ossf-package-analysis (77e16e0b65be41b278edbb76b9a9d73b9567d78d302a6b568dc037ced7efce7f) The OpenSSF Package Analysis project identified 'staking-apr-fetcher' @ 0.9.1 (rubygems) as malicious. It is considered malicious because: - The package executes one or more commands associated with malicious behavior.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • RubyGems staking-apr-fetcher0.9.1

How to fix MAL-2026-17796

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

Exploitation likelihood is not on this record for MAL-2026-17796. A missing EPSS score is not a low risk. Compare Malicious code in staking-apr-fetcher with the linked advisory before you change production.

Which versions are affected?

Compare what you have installed with 0.9.1. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS is not on this record yet. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Oct 11, 2026 · Catalog

    Detected

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (405ab5b9651b8e8817ae91290042ec22673c5c99c1b58f45747e47cbb85aeacf) The gem declares a native extension whose build script (extconf.rb) decodes a base64-embedded Ruby payload and executes it via eval during . The payload double-forks a detached background process that opens a TCP connection to the hardcoded host

  2. Oct 13, 2026 · Catalog

    Updated

    --- _-= Per source details. Do not edit below this line.=-_ ## Source: amazon-inspector (405ab5b9651b8e8817ae91290042ec22673c5c99c1b58f45747e47cbb85aeacf) The gem declares a native extension whose build script (extconf.rb) decodes a base64-embedded Ruby payload and executes it via eval during . The payload double-forks a detached background process that opens a TCP connection to the hardcoded host

Sources

References

Freshness

Last verified in this catalog Oct 13, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.