VulnTideExploited vulnerabilities, by vendor. Data as of 28 Oct 2026.
Known exploitedIn CISA's KEV catalog since 7 July 2025Ransomware use: unknown
Rails Ruby on Rails

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

Is it exploited?

Yes. CISA added it to the Known Exploited Vulnerabilities catalog on 7 Jul 2025, 2,294 days after the CVE record was published.

How likely is exploitation in the next 30 days?
98.5%

EPSS score, percentile 99.9 of all scored records

How severe?
7.5 High

CVSS v3.1 base score, from CISA's enrichment of the record

What should I do?

Required action (CISA), due 28 Jul 2025: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Advisories and patches (6)

Which versions are affected?

Affected: 5.2.2.1; 5.1.6.2; 5.0.7.2; 4.2.11.1

Versions by product

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

What to do

Required action, set by CISA

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 due date for this action: 28 July 2025.

Advisories and patches

Linked from CISA's catalog entry

Affected products and versions

As listed in the CVE record.

Rails https://github.com/rails/rails
StatusVersions
Affected5.2.2.1
Affected5.1.6.2
Affected5.0.7.2
Affected4.2.11.1

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

About this vulnerability

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.

Summary: CISA's KEV catalog, as of 28 Oct 2026.

  • CISA added CVE-2019-5418 to its Known Exploited Vulnerabilities (KEV) catalog on 7 Jul 2025.
  • CISA's ransomware flag for this entry is "Unknown": no evidence of ransomware use in the catalog, which is not proof of none.
  • The due date CISA sets for the required action is 28 Jul 2025.
  • The CVE record was published on 27 Mar 2019, 2,294 days before it was added to KEV.
  • The CVE record carries a CVSS v3.1 base score of 7.5 (High), taken from CISA's enrichment of the record.
  • FIRST's EPSS model puts the probability of exploitation in the next 30 days at 98.5% (percentile 99.9), as of 28 Oct 2026.
  • CISA's SSVC assessment in the CVE record: exploitation active, automatable yes, technical impact partial.

Source: CISA Known Exploited Vulnerabilities (KEV) catalog, 2026.10.28, as of 28 Oct 2026; CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026; FIRST Exploit Prediction Scoring System (EPSS), v2026.06.15, as of 28 Oct 2026. About the data.

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.

Source: CVE List V5 (CVE Program), cve_2026-10-28_0000Z, as of 28 Oct 2026. About the data.

Weakness

CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record and the KEV entry.

Timeline

DateEvent
27 Mar 2019CVE record published
7 Jul 2025Added to CISA KEV
28 Jul 2025CISA due date for the required action
21 Oct 2025CVE record last updated

References

More exploited Rails vulnerabilities

  • CVE-2014-0130: Ruby on Rails Directory Traversal Vulnerability (added 25 Mar 2022)
  • CVE-2016-0752: Ruby on Rails Directory Traversal Vulnerability (added 25 Mar 2022)