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CVE-2019-5418

Rails Ruby on Rails Path Traversal

7.5 HIGHActively exploited (CISA KEV)Public exploitEPSS 98.5%
  1. Published27 Mar 2019
  2. Added to CISA KEV7 Jul 2025
  3. Remediation due28 Jul 2025
Actively exploited (CISA KEV)

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.

Added to KEV: 7 Jul 2025Federal remediation due: 28 Jul 2025

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 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected products

Redhat Cloudforms4.6 · 4.7
Redhat Software Collections1.0
Rubyonrails Rails≥ 3.0.0 < 4.2.11.1 · ≥ 5.0.0 < 5.0.7.2 · ≥ 5.1.0 < 5.1.6.2 · ≥ 5.2.0 < 5.2.2.1
Debian Linux8.0
Fedoraproject Fedora30
Opensuse Leap15.0

Remediation

Fixed in
Rubyonrails Rails≥ 4.2.11.1

References

and 4 more references

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Frequently asked

Is CVE-2019-5418 being actively exploited?

Yes. CVE-2019-5418 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 7 Jul 2025.

How severe is CVE-2019-5418?

CVE-2019-5418 has a CVSS 3.1 base score of 7.5, rated high. EPSS estimates a 98.5% probability of exploitation.

Which products are affected by CVE-2019-5418?

Affected products include Redhat Cloudforms, Redhat Software Collections, Rubyonrails Rails, Debian Linux, Fedoraproject Fedora, and 1 more.

How do I fix CVE-2019-5418?

Upgrade affected software to a fixed version, for example Rubyonrails Rails 4.2.11.1 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2019-5418 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.