CVE-2019-5418VulnerabilityPublished 07/07/2025Updated 10/24/2026
CVE-2019-5418: Rails Ruby on Rails Path Traversal Vulnerability
Affects Rails Ruby on RailsSource CISA KEV
Severity
HighNo CVSS score published yet
- Exploitation
Actively exploited – in CISA KEV since 07/07/2025
- KEV deadline
- 07/28/2025
- EPSS
- 98.5% chance of exploitation in 30 days – higher than 99% of CVEs
What to do
CISA required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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.