What is CVE-2019-15224?

CVE-2019-15224 is a critical-severity vulnerability in Rest-Client Project, classified under Code Injection. CVSS score: 9.8/10. Published 2019-08-19.

How severe is CVE-2019-15224?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Is CVE-2019-15224 known to be exploited?

5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

RCE in Rest-Client Project

CVE-2019-15224

The rest-client gem 1.6.10 through 1.6.13 for Ruby, as distributed on RubyGems.org, included a code-execution backdoor inserted by a third party. Versions <=1.6.9 and >=1.6.14 are unaffected.

Vulnerability class: RCE (Remote Code Execution)

Published 2019-08-19 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.035 (88.9th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 88.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.035 · newest: 0.035 · change: 0.000

Affected products

Rest-Client Project

Weakness classification (CWE)

CWE-94 — Code Injection

Public proof-of-concept exploits

References

github.com/rest-client/rest-client/issues/713 (Third Party Advisory, Issue Tracking)
rubygems.org/gems/rest-client/versions/ (Product)

Frequently asked questions

What is CVE-2019-15224?: CVE-2019-15224 is a critical-severity vulnerability in Rest-Client Project, classified under Code Injection. CVSS score: 9.8/10. Published 2019-08-19.
How severe is CVE-2019-15224?: Critical severity. CVSS v3 base score is 9.8 out of 10.
Is CVE-2019-15224 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.