CVE-2019-5419

Exp

There is a possible denial of service vulnerability in Action View (Rails) <5.2.2.1, <5.1.6.2, <5.0.7.2, <4.2.11.1 where specially crafted accept headers can cause action view to consume 100% cpu and make the server unresponsive.

Published: 2019-03-27 Last update: 2024-11-21 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2019-5419 is rated High Exploit Risk (74.6/100): CVSS High severity, with high exploitation likelihood (EPSS 8.67%, 94th percentile). 1 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2019-5419

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2019-5419

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 12.12% 8.67% -3.45%
2 2026-03-04 4.26% 12.12% +7.86%
3 2026-03-01 — 4.26% —

Full EPSS history (37 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2019-5419

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 3.6 [email protected]
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2019-5419

GitHub Security Advisory for CVE-2019-5419

GHSA-m63j-wh5w-c252 · Severity: high · Ecosystem: rubygems — Denial of Service Vulnerability in Action View

OS Trackers for CVE-2019-5419

vendor priority summary link
debian not yet assigned CVE-2019-5419 not yet assigned priority: Debian including 1 source packages (rails), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2019-5419
redhat medium — https://access.redhat.com/security/cve/CVE-2019-5419
suse low — https://www.suse.com/security/cve/CVE-2019-5419/
ubuntu medium CVE-2019-5419 medium priority: Ubuntu including 7 source packages (rails, rails-4.0, …), 133 status rows across 19 suites (bionic, cosmic, disco, eoan, focal, groovy, hirsute, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): DNE 109, not-affected 13, needs-triage 6, ignored 2, needed 2, released 1. https://ubuntu.com/security/CVE-2019-5419

Affected software / configurations for CVE-2019-5419

Vendor Product Version Raw CPE
rubyonrails rails < 4.2.11.1 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails >= 5.0.0, < 5.0.7.2 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails >= 5.1.0, < 5.1.6.2 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
rubyonrails rails >= 5.2.0, < 5.2.2.1 cpe:2.3:a:rubyonrails:rails:*:*:*:*:*:*:*:*
debian debian_linux 8.0 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
redhat cloudforms 4.6 cpe:2.3:a:redhat:cloudforms:4.6:*:*:*:*:*:*:*
redhat cloudforms 4.7 cpe:2.3:a:redhat:cloudforms:4.7:*:*:*:*:*:*:*
redhat software_collections 1.0 cpe:2.3:a:redhat:software_collections:1.0:*:*:*:*:*:*:*
opensuse leap 15.0 cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*
opensuse leap 15.1 cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*
fedoraproject fedora 30 cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*

References for CVE-2019-5419

URL Tags
http://lists.opensuse.org/opensuse-security-announce/2019-05/msg00011.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00025.html Mailing List Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-08/msg00001.html Mailing List Third Party Advisory
http://www.openwall.com/lists/oss-security/2019/03/22/1 Exploit Mailing List Mitigation Patch Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:0796 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1147 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1149 Third Party Advisory
https://access.redhat.com/errata/RHSA-2019:1289 Third Party Advisory
https://groups.google.com/forum/#%21topic/rubyonrails-security/GN7w9fFAQeI
https://lists.debian.org/debian-lts-announce/2019/03/msg00042.html Mailing List Third Party Advisory
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/ Patch Third Party Advisory
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