CVE-2019-5418

HIGH7.5

CISA KEV

Published 2019-03-27 · Updated 2026-06-17 · Source support@hackerone.com

Summary

CVE-2019-5418 is a high-severity (CVSS 7.5) vulnerability in Rails Ruby on Rails. CISA added it to the Known Exploited Vulnerabilities catalog on July 7, 2025, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by July 28, 2025. CISA does not currently list it as used in ransomware campaigns. Rails has 3 vulnerabilities in the KEV catalog, 0 of them linked to ransomware.

All 3 known-exploited Rails vulnerabilities →

Description

There is a File Content Disclosure vulnerability in Action View <5.2.2.1, <5.1.6.2, <5.0.7.2, <4.2.11.1 and v3 where specially crafted accept headers can cause contents of arbitrary files on the target system's filesystem to be exposed.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

CWE-22

CISA Known-Exploited Vulnerability

Product: Rails — Ruby on Rails

Name: Rails Ruby on Rails Path Traversal Vulnerability

Date added: 2025-07-07 · Due: 2025-07-28

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.

References

View on NVD

More exploited Rails vulnerabilities

Most recently added to CISA KEV

CVE-2016-0752
Ruby on Rails — Ruby on Rails Directory Traversal Vulnerability
added 2022-03-25
CVE-2014-0130
Ruby on Rails — Ruby on Rails Directory Traversal Vulnerability
added 2022-03-25

View all →

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