CVE-2019-5418
Rails Ruby on Rails Path Traversal Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
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 notes
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
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.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:NExploitation Context
as of October 14, 2026- CISA added CVE-2019-5418 to the KEV catalog 2,294 days after its CVE record was published. The median for entries added in 2025 is 26 days.
- It is one of 3 Rails entries in the CISA KEV catalog, and the only one added in 2025.
- Its current EPSS score (98.5%) is higher than that of 85% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Rails | Rails https://github.com/rails/rails | 5.2.2.1 5.1.6.2 5.0.7.2 4.2.11.1 |
References
12 LinksRecord Details
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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.