CVE & CISA-KEV Catalog

CVE-2018-1000076

CRITICALEPSS 86th pctl
9.8
CVSS v3
NVD

Description

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 Improper Verification of Cryptographic Signature vulnerability in package.rb that can result in a mis-signed gem could be installed, as the tarball would contain multiple gem signatures.. This vulnerability appears to have been fixed in 2.7.6.

CWE-347

How to fix

Remediation Available
rubyAmazon
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
ruby-debuginfoAmazon
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
ruby-develAmazon
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
ruby-docAmazon
Fixed in:0:2.0.0.648-36.amzn2.0.1
ruby-irbAmazon
Fixed in:0:2.0.0.648-36.amzn2.0.1
ruby-libsAmazon
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
ruby-tcltkAmazon
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
Fixed in:0:2.0.0.648-36.amzn2.0.1
rubygem-bigdecimalAmazon
Fixed in:0:1.2.0-36.amzn2.0.1
Fixed in:0:1.2.0-36.amzn2.0.1
Fixed in:0:1.2.0-36.amzn2.0.1
rubygem-io-consoleAmazon
Fixed in:0:0.4.2-36.amzn2.0.1
Fixed in:0:0.4.2-36.amzn2.0.1
Fixed in:0:0.4.2-36.amzn2.0.1
rubygem-jsonAmazon
Fixed in:0:1.7.7-36.amzn2.0.1
Fixed in:0:1.7.7-36.amzn2.0.1
Fixed in:0:1.7.7-36.amzn2.0.1
rubygem-minitestAmazon
Fixed in:0:4.3.2-36.amzn2.0.1
rubygem-psychAmazon
Fixed in:0:2.0.0-36.amzn2.0.1
Fixed in:0:2.0.0-36.amzn2.0.1
Fixed in:0:2.0.0-36.amzn2.0.1
rubygem-rakeAmazon
Fixed in:0:0.9.6-36.amzn2.0.1
rubygem-rdocAmazon
Fixed in:0:4.0.0-36.amzn2.0.1
rubygemsAmazon
Fixed in:0:2.0.14.1-36.amzn2.0.1
rubygems-develAmazon
Fixed in:0:2.0.14.1-36.amzn2.0.1
jrubyDebian
Fixed in:9.1.17.0-1CVE-2018-1000076
Fixed in:9.1.17.0-1CVE-2018-1000076
Fixed in:9.1.17.0-1CVE-2018-1000076
libruby1.9.1Ubuntu
Fixed in:1.9.3.484-2ubuntu1.8USN-3621-1

This Ubuntu release reached end-of-life on 2019-04-02.

libruby2.0Ubuntu
Fixed in:2.0.0.484-1ubuntu2.6USN-3621-1

This Ubuntu release reached end-of-life on 2019-04-02.

libruby2.3Ubuntu
Fixed in:2.3.1-2~16.04.7USN-3621-1

This Ubuntu release reached end-of-life on 2021-04-02.

ruby1.9.1Ubuntu
Fixed in:1.9.3.484-2ubuntu1.8USN-3621-1

This Ubuntu release reached end-of-life on 2019-04-02.

ruby1.9.3Ubuntu
Fixed in:1.9.3.484-2ubuntu1.8USN-3621-1

This Ubuntu release reached end-of-life on 2019-04-02.

ruby2.0Ubuntu
Fixed in:2.0.0.484-1ubuntu2.6USN-3621-1

This Ubuntu release reached end-of-life on 2019-04-02.

ruby2.3Ubuntu
Fixed in:2.3.1-2~16.04.7USN-3621-1

This Ubuntu release reached end-of-life on 2021-04-02.

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Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeUnchanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

2.93%probability of exploitation in 30 days
86thpercentile

Elevated risk: more likely to be exploited than 86% of all known CVEs.

References

Vendor Advisory1

Related Vulnerabilities

Other CWE-347 vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2018-16042Medium6.582%--
CVE-2025-59718Critical9.868%KEVFix
CVE-2025-25292Critical9.865%-Fix
CVE-2026-48558Critical10.064%KEVFix
CVE-2021-22160Critical9.853%-Fix
CVE-2013-3900Medium5.545%KEV-

Common questions

How do I fix CVE-2018-1000076?

Published advisories record a fix for 24 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2018-1000076 being actively exploited?

Not that we know of. CVE-2018-1000076 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 2.9% is the estimated probability that it will be exploited in the next 30 days. That is higher than 86% of all scored CVEs.

How severe is CVE-2018-1000076?

CVE-2018-1000076 has a CVSS v3 base score of 9.8, rated critical. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2018-1000076 affect?

Published advisories record a fix for ruby (Amazon), ruby-debuginfo (Amazon), ruby-devel (Amazon), ruby-doc (Amazon), and 20 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-06-17.