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CVE-2018-1000076

29
FAUCET Score

CVE-2018-1000076 is a critical vulnerability in RubyGems versions prior to 2.7.6, affecting Ruby 2.2, 2.3, 2.4, and 2.5 series. This flaw, categorized as Improper Verification of Cryptographic Signature (CWE-347), allows for the installation of mis-signed gems due to the presence of multiple gem signatures within a tarball. With a CVSS score of 9.8 (CRITICAL), this vulnerability has a network attack vector, low attack complexity, and can lead to complete compromise of confidentiality, integrity, and availability. The FAUCET Risk Score is 80/100, indicating a high potential risk. Currently, there is no evidence of active exploitation, nor is exploit code available in Metasploit, Nuclei, or ExploitDB. Community discussion and media coverage for this CVE are minimal, which is typical for the vast majority of vulnerabilities.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.2.9CPE matchmatch criteria
cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
<= 2.3.6CPE matchmatch criteria
cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
<= 2.4.3CPE matchmatch criteria
cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
<= 2.5.0CPE matchmatch criteria
cpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
2.99%
Probability of exploitation in next 30 days
EPSS Percentile
85.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0299 is in the 77th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (27)

github_advisorypatch availablevia nvd_reference
View patch
mavenpatch availablevia ghsa
Product: org.jruby:jruby-stdlibFixed in: 9.1.16.0
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: ruby-0:2.0.0.648-36.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.4 Advanced Update SupportFixed in: ruby-0:2.0.0.648-35.el7_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.4 Telco Extended Update SupportFixed in: ruby-0:2.0.0.648-35.el7_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.4 Update Services for SAP SolutionsFixed in: ruby-0:2.0.0.648-35.el7_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.5 Extended Update SupportFixed in: ruby-0:2.0.0.648-35.el7_5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7.6 Extended Update SupportFixed in: ruby-0:2.0.0.648-36.el7_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-ruby23-ruby-0:2.3.8-69.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 6Fixed in: rh-ruby24-ruby-0:2.4.5-91.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-ruby23-ruby-0:2.3.8-69.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-ruby24-ruby-0:2.4.5-91.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-ruby25-ruby-0:2.5.3-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-ruby23-ruby-0:2.3.8-69.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-ruby24-ruby-0:2.4.5-91.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.4 EUSFixed in: rh-ruby25-ruby-0:2.5.3-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-ruby23-ruby-0:2.3.8-69.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-ruby24-ruby-0:2.4.5-91.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.5 EUSFixed in: rh-ruby25-ruby-0:2.5.3-6.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-ruby24-ruby-0:2.4.5-91.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-ruby23-ruby-0:2.3.8-69.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7.6 EUSFixed in: rh-ruby25-ruby-0:2.5.3-6.el7
View patch
rubygemspatch availablevia ghsa
Product: rubygems-updateFixed in: 2.7.6
redhatend of lifevia redhat_api
Product: Red Hat Subscription Asset ManagerFixed in: ruby193-rubygems
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: rubygems
redhatend of lifevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: rubygems
redhatend of lifevia redhat_api
Product: Red Hat Satellite 6Fixed in: rubygems

Vendor Advisories (2)

rubygemsGHSA-mc6j-h948-v2p6critical

RubyGems Improper Verification of Cryptographic Signature vulnerability

May 14, 2022
redhatCVE-2018-1000076Moderate

rubygems: Improper verification of signatures in tarball allows to install mis-signed gem

Feb 15, 2018

References

blog.rubygems.org / 2018/02/15/2.7.6-released.html
Vendor Advisory
lists.opensuse.org / opensuse-security-announce/2019-07/msg00036.html
access.redhat.com / errata/RHSA-2018:3729
access.redhat.com / errata/RHSA-2018:3730
access.redhat.com / errata/RHSA-2018:3731
access.redhat.com / errata/RHSA-2019:2028
access.redhat.com / errata/RHSA-2020:0542
access.redhat.com / errata/RHSA-2020:0591
access.redhat.com / errata/RHSA-2020:0663
github.com / rubygems/rubygems/commit/f5042b879259b1f1ce95a0c5082622c646376693
PatchThird Party Advisory
lists.debian.org / debian-lts-announce/2018/04/msg00000.html
Third Party Advisory
lists.debian.org / debian-lts-announce/2018/04/msg00001.html
Third Party Advisory
lists.debian.org / debian-lts-announce/2018/04/msg00023.html
lists.debian.org / debian-lts-announce/2018/07/msg00012.html
lists.debian.org / debian-lts-announce/2019/05/msg00028.html
usn.ubuntu.com / 3621-1
debian.org / security/2018/dsa-4219
debian.org / security/2018/dsa-4259