---
title: "CVE-2019-5418: Rails Ruby on Rails Path Traversal Vulnerability"
url: https://erroneo.us/security/cve/CVE-2019-5418/
description: "CVE-2019-5418 (Rails Ruby on Rails): Exploited in the wild (CISA KEV). There is a File Content Disclosure vulnerability in Action View"
type: vulnerability-record
section: "Security Digest"
date_published: 2019-03-27
date_modified: 2025-10-21
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2019-5418"
kev: true
cvss: 7.5
epss: 0.98507
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2019-5418: Rails Ruby on Rails Path Traversal Vulnerability

**Signal:** Exploited: patch now if you run it. CISA has confirmed exploitation in the wild. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Yes, if you run Rails Ruby on Rails. CISA added this CVE to its Known Exploited Vulnerabilities catalog on 2025-07-07, which means there is reliable evidence of exploitation in the wild. US federal agencies must remediate by 2025-07-28 ; treat that as the outer limit, not the target.
- EPSS 98.5% , percentile 99.9: FIRST’s model estimates a 98.5% chance of exploitation activity in the next 30 days, higher than 99.9% of all scored CVEs (very high). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.

## What it is

There is a File Content Disclosure vulnerability in Action View

## Affected products (CVE record)

- Rails https://github.com/rails/rails: 5.2.2.1, 5.1.6.2, 5.0.7.2, 4.2.11.1

## Severity

- CISA-ADP CVSS 3.1: 7.5 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`

## Exploitation

- CISA KEV: added 2025-07-07; federal due date 2025-07-28. Known ransomware use: Unknown.
- 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.
- CISA SSVC assessment: exploitation active , automatable yes , technical impact partial .
- FIRST EPSS (model of 2026-10-21): 98.51% probability of exploitation activity in the next 30 days; percentile 99.9.

## Sources

- [RHSA-2019:0796](https://access.redhat.com/errata/RHSA-2019:0796)
- [openSUSE-SU-2019:1344](http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00011.html)
- [FEDORA-2019-1cfe24db5c](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y43636TH4D6T46IC6N2RQVJTRFJAAYGA/)
- [RHSA-2019:1149](https://access.redhat.com/errata/RHSA-2019:1149)
- [RHSA-2019:1147](https://access.redhat.com/errata/RHSA-2019:1147)
- [RHSA-2019:1289](https://access.redhat.com/errata/RHSA-2019:1289)
- [Listed in CISA KEV notes (web.archive.org)](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/)
- [CVE.org record CVE-2019-5418](https://www.cve.org/CVERecord?id=CVE-2019-5418)
- [NVD entry CVE-2019-5418](https://nvd.nist.gov/vuln/detail/CVE-2019-5418)
- [CISA Known Exploited Vulnerabilities catalog entry](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5418)
- [46585](https://www.exploit-db.com/exploits/46585/)
- [packetstormsecurity.com](http://packetstormsecurity.com/files/152178/Rails-5.2.1-Arbitrary-File-Content-Disclosure.html)
- [[oss-security] 20190322 [CVE-2019-5418] Amendment: Possible Remote Code Execution Exploit in Action View](http://www.openwall.com/lists/oss-security/2019/03/22/1)
- [weblog.rubyonrails.org](https://weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-released/)
- [groups.google.com](https://groups.google.com/forum/#%21topic/rubyonrails-security/pFRKI96Sm8Q)
- [[debian-lts-announce] 20190331 [SECURITY] [DLA 1739-1] rails security update](https://lists.debian.org/debian-lts-announce/2019/03/msg00042.html)

---
Source page: https://erroneo.us/security/cve/CVE-2019-5418/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt