# CVE-2019-5418: A Rails Ruby on Rails bug is being used in attacks

Status: Being used now (CISA KEV, added 2025-07-07)
Who: 
Do this: 

## Agent prompt (read-only)
Read-only check, change nothing, send nothing anywhere.
Is Rails Ruby on Rails (CVE-2019-5418) installed or running on this machine or in this project?
1. Find every copy and its version (apps, packages, containers, lockfiles).
2. Compare each version against the vendor's fixed version for CVE-2019-5418. Quote the vendor page you used.
3. Report a table: where, version, fixed version, status (exposed / fixed / not installed / unsure).
4. List the exact update steps, but do not run them.

## Official description
Rails Ruby on Rails contains a path traversal vulnerability in Action View. Specially crafted accept headers in combination with calls to `render file:` can cause arbitrary files on the target server to be rendered, disclosing the file contents.

## Sources
- https://web.archive.org/web/20190313201629/https://weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-released/
- https://nvd.nist.gov/vuln/detail/CVE-2019-5418
- https://nvd.nist.gov/vuln/detail/CVE-2019-5418

Generated by isitexploited.org from public sources. Verify version numbers against the vendor before acting.