CVE-2019-5418
CVE-2019-5418 is a high-severity vulnerability in Rubyonrails Rails with a CVSS 3.x base score of 7.5. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2025-07-07). The underlying weakness is classified as CWE-22.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 99% (100th percentile)
- Actively exploited: Yes — listed in CISA KEV (added 2025-07-07)
- EU (EUVD) id: EUVD-2019-0375
- EU exploitation: Flagged exploited in the ENISA EU Vulnerability Database (since 2025-07-07)
- Weakness: CWE-22
- Affected product: Rubyonrails Rails
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2019-5418?
- 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.
- How severe is CVE-2019-5418?
- CVE-2019-5418 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
- Is CVE-2019-5418 being actively exploited?
- Yes. CVE-2019-5418 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2025-07-07, which means active exploitation has been confirmed. It should be prioritised for remediation.
- What products are affected by CVE-2019-5418?
- CVE-2019-5418 primarily affects Rubyonrails Rails. In total, 7 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2019-5418?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
- Does CVE-2019-5418 have an EU (EUVD) identifier?
- Yes. CVE-2019-5418 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-0375. It is also flagged as exploited in the EUVD (since 2025-07-07).
- When was CVE-2019-5418 published?
- CVE-2019-5418 was published on 2019-03-27 and last updated on 2026-06-17.
References
- http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00011.html
- http://packetstormsecurity.com/files/152178/Rails-5.2.1-Arbitrary-File-Content-Disclosure.html
- http://www.openwall.com/lists/oss-security/2019/03/22/1
- https://access.redhat.com/errata/RHSA-2019:0796
- https://access.redhat.com/errata/RHSA-2019:1147
- https://access.redhat.com/errata/RHSA-2019:1149
- https://access.redhat.com/errata/RHSA-2019:1289
- https://groups.google.com/forum/#%21topic/rubyonrails-security/pFRKI96Sm8Q
- https://lists.debian.org/debian-lts-announce/2019/03/msg00042.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y43636TH4D6T46IC6N2RQVJTRFJAAYGA/
- https://weblog.rubyonrails.org/2019/3/13/Rails-4-2-5-1-5-1-6-2-have-been-released/
- https://www.exploit-db.com/exploits/46585/
- 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://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2019-5418
Affected products (7)
- cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
- cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:cloudforms:4.7:*:*:*:*:*:*:*
- cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:cloudforms:4.6:*:*:*:*:*:*:*
- cpe:2.3:a:redhat:software_collections:1.0:*:*:*:*:*:*:*
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