What is CVE-2018-1000074?

CVE-2018-1000074 is a high-severity vulnerability in Rubygems, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2018-03-13.

How severe is CVE-2018-1000074?

High severity. CVSS v3 base score is 7.8 out of 10.

Is CVE-2018-1000074 known to be exploited?

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

Deserialization in Rubygems

CVE-2018-1000074

RubyGems version Ruby 2.2 series: 2.2.9 and earlier, Ruby 2.3 series: 2.3.6 and earlier, Ruby 2.4 series: 2.4.3 and earlier, Ruby 2.5 series: 2.5.0 and earlier, prior to trunk revision 62422 contains a Deserialization of Untrusted Data vulnerability in owner command that can result in code execution. This attack appear to be exploitable via victim must run the `gem owner` command on a gem with a specially crafted YAML file. This vulnerability appears to have been fixed in 2.7.6.

Vulnerability class: Insecure Deserialization

Published 2018-03-13 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.029 (86.4th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 86th percentile — 86.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.029 · newest: 0.029 · change: 0.000

Affected products

Rubygems

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

usn.ubuntu.com/3685-1/ (vendor-advisory)
usn.ubuntu.com/3621-2/ (vendor-advisory)
github.com/rubygems/rubygems/commit/254e3d0ee873c008c0b74e8b8abcbdab4caa0a6d (Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2018/04/msg00017.html (mailing-list)
www.debian.org/security/2018/dsa-4219 (vendor-advisory)
usn.ubuntu.com/3621-1/ (vendor-advisory)
access.redhat.com/errata/RHSA-2018:3729 (vendor-advisory)
access.redhat.com/errata/RHSA-2018:3730 (vendor-advisory)
access.redhat.com/errata/RHSA-2018:3731 (vendor-advisory)
lists.debian.org/debian-lts-announce/2018/08/msg00028.html (mailing-list)

Frequently asked questions

What is CVE-2018-1000074?: CVE-2018-1000074 is a high-severity vulnerability in Rubygems, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2018-03-13.
How severe is CVE-2018-1000074?: High severity. CVSS v3 base score is 7.8 out of 10.
Is CVE-2018-1000074 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.