Rails flaws being used in attacks

CISA lists 3 flaws in Rails products as being used in attacks, most recently on 7 Jul 2025.

What to do

1. Update every Rails product you use.Install the updates Rails offers, on every device, and restart when asked. Each flaw below has a fix or clear advice; that’s one of CISA’s conditions for listing it.
2. If someone looks after IT for you, send them this page.Many of these are in equipment you don’t see: routers, firewalls, servers, the office network. Ask them to confirm each one is fixed, or that you don’t use the product.
3. Check anything else in the lookup.Search any app, company or CVE. Not being on CISA’s list doesn’t mean safe: keep updating either way.

Every flaw, newest first

1. Being used in attacksAdded by CISA on 7 Jul 2025
   Rails Ruby on Rails
   CVE-2019-5418Rails Ruby on Rails Path Traversal Vulnerability
   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.
   CISA’s required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
   CVE recordNVD
2. Being used in attacksAdded by CISA on 25 Mar 2022
   Rails Ruby on Rails
   CVE-2016-0752Ruby on Rails Directory Traversal Vulnerability
   Directory traversal vulnerability in Action View in Ruby on Rails allows remote attackers to read arbitrary files.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD
3. Being used in attacksAdded by CISA on 25 Mar 2022
   Rails Ruby on Rails
   CVE-2014-0130Ruby on Rails Directory Traversal Vulnerability
   Directory traversal vulnerability in actionpack/lib/abstract_controller/base.rb in the implicit-render implementation in Ruby on Rails allows remote attackers to read arbitrary files via a crafted request.
   CISA’s required actionApply updates per vendor instructions.
   CVE recordNVD

From CISA’s Known Exploited Vulnerabilities catalog, updated 21 Oct 2026 (version 2026.10.21). CISA’s required actions are written for US government agencies. Rails on CISA’s site.