CVE-2019-13146: The field_test gem 0.3.0 for Ruby has unvalidated input

This week

MEDIUM 5.3REMOTEDOWNGRADE

CVE-2019-13146 is a medium-severity flaw (CVSS 5.3) affecting field test. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

The field_test gem 0.3.0 for Ruby has unvalidated input. A method call that is expected to return a value from a certain set of inputs can be made to return any input, which can be dangerous depending on how applications use it. If an application treats arbitrary variants as trusted, this can lead to a variety of potential vulnerabilities like SQL injection or cross-site scripting (XSS).

Why this priority

Public exploit reference
Remotely exploitable, no login, no user action

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.3 (Medium)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	1.4% (top 27%)
CISA exploited list	No
Weakness	CWE-74
Published	2019-07-09
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: field test project

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2019-07-09 18:15 UTCPublished CVE record published
2026-06-17 02:16 UTCUpdated Record last modified

field test project field test DOWNGRADE

Affected: 0.3.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 0.3.0

1. Check installed version

apt-cache policy field-test || rpm -q field-test || field-test --version

2. No fixed release: DOWNGRADE to a release before 0.3.0 (Debian / Ubuntu)

apt-cache madison field-test sudo apt install field-test=<VERSION_BEFORE_0.3.0> sudo apt-mark hold field-test

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list field-test sudo dnf downgrade field-test-<VERSION_BEFORE_0.3.0> sudo dnf versionlock add field-test

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2019-13146?

field test: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2019-13146 being exploited?

CVE-2019-13146 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2019-13146 affect?

CVE-2019-13146 affects field test. Severity is medium (CVSS 5.3). The field_test gem 0.3.0 for Ruby has unvalidated input. A method call that is expected to return a value from a certain set of inputs can be made to return any input, which can be dangerous depending on how applications use it. If an appli

How urgent is CVE-2019-13146?

Priority 47/100. Public exploit reference; Remotely exploitable, no login, no user action

Software pages

Ruby vulnerabilities

Related CVEs

CVE-2020-16252 MEDIUM 4.3 UPGRADE The Field Test gem 0.2.0 through 0.3.2 for Ruby allows CSRF.

References

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