What is CVE-2018-1000073?

CVE-2018-1000073 is a high-severity vulnerability in Rubygems, classified under Improper Link Resolution Before File Access. CVSS score: 7.5/10. Published 2018-03-13.

How severe is CVE-2018-1000073?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2018-1000073 known to be exploited?

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

Vulnerability in Rubygems

CVE-2018-1000073

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 Directory Traversal vulnerability in install_location function of package.rb that can result in path traversal when writing to a symlinked basedir outside of the root. This vulnerability appears to have been fixed in 2.7.6.

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

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.049 (91.8th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 92nd percentile — 91.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.049 · newest: 0.049 · change: 0.000

Affected products

Rubygems

Weakness classification (CWE)

CWE-59 — Improper Link Resolution Before File Access

Public proof-of-concept exploits

ARPSyndicate/cvemon

References

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)
github.com/rubygems/rubygems/commit/1b931fc03b819b9a0214be3eaca844ef534175e2 (Patch, Third Party Advisory)
lists.debian.org/debian-lts-announce/2018/08/msg00028.html (mailing-list)
www.debian.org/security/2018/dsa-4259 (vendor-advisory)
blog.rubygems.org/2018/02/15/2.7.6-released.html (Vendor Advisory)
lists.opensuse.org/opensuse-security-announce/2019-07/msg00036.html (vendor-advisory)

Frequently asked questions

What is CVE-2018-1000073?: CVE-2018-1000073 is a high-severity vulnerability in Rubygems, classified under Improper Link Resolution Before File Access. CVSS score: 7.5/10. Published 2018-03-13.
How severe is CVE-2018-1000073?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2018-1000073 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.