What is CVE-2017-0900?

CVE-2017-0900 is a high-severity vulnerability in Rubygems, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-08-31.

How severe is CVE-2017-0900?

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

Is CVE-2017-0900 known to be exploited?

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

Improper input validation in Rubygems

CVE-2017-0900

RubyGems version 2.6.12 and earlier is vulnerable to maliciously crafted gem specifications to cause a denial of service attack against RubyGems clients who have issued a `query` command.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2017-08-31 · 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:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.083 (94.7th percentile), scored 2026-10-02.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.085 · newest: 0.083 · change: -0.002

Affected products

Rubygems
Debian Linux — versions 8.0, 9.0
Red Hat Enterprise Linux Desktop — versions 7.0
Red Hat Enterprise Linux Server — versions 7.0
Red Hat Enterprise Linux Server Aus — versions 7.4, 7.6
Red Hat Enterprise Linux Server Eus — versions 7.4, 7.5, 7.6
Red Hat Enterprise Linux Server Tus — versions 7.4, 7.6
Red Hat Enterprise Linux Workstation — versions 7.0

Weakness classification (CWE)

CWE-20 — Improper Input Validation

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

access.redhat.com/errata/RHSA-2018:0585 (vendor-advisory, Third Party Advisory)
www.debian.org/security/2017/dsa-3966 (vendor-advisory, Third Party Advisory)
access.redhat.com/errata/RHSA-2018:0378 (vendor-advisory, Third Party Advisory)
hackerone.com/reports/243003 (Exploit, Third Party Advisory)
www.securitytracker.com/id/1039249 (VDB Entry, Third Party Advisory, vdb-entry)
access.redhat.com/errata/RHSA-2017:3485 (vendor-advisory, Third Party Advisory)
lists.debian.org/debian-lts-announce/2018/07/msg00012.html (mailing-list, Mailing List, Third Party Advisory)
www.securityfocus.com/bid/100579 (VDB Entry, Third Party Advisory, vdb-entry)
access.redhat.com/errata/RHSA-2018:0583 (vendor-advisory, Third Party Advisory)
security.gentoo.org/glsa/201710-01 (vendor-advisory, Third Party Advisory)

Frequently asked questions

What is CVE-2017-0900?: CVE-2017-0900 is a high-severity vulnerability in Rubygems, classified under Improper Input Validation. CVSS score: 7.5/10. Published 2017-08-31.
How severe is CVE-2017-0900?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2017-0900 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.