Is CVE-2013-4363 being actively exploited?

CVE-2013-4363 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-4363?

CVE-2013-4363 has a CVSS 2.0 base score of 4.3 (MEDIUM).

CVE-2013-4363

MEDIUM · CVSS 4.3EPSS 1.7%EU EUVD

Algorithmic complexity vulnerability in Gem::Version::ANCHORED_VERSION_PATTERN in lib/rubygems/version.rb in RubyGems before 1.8.23.2, 1.8.24 through 1.8.26, 2.0.x before 2.0.10, and 2.1.x before 2.1.5, as used in Ruby 1.9.0 through 2.0.0p247, allows remote attackers to cause a denial of service (CPU consumption) via a crafted gem version that triggers a large amount of backtracking in a regular expression. NOTE: this issue is due to an incomplete fix for CVE-2013-4287.

Key facts

CVSS score: 4.3 (v2.0)
Severity: MEDIUM
CVSS vector: AV:N/AC:M/Au:N/C:N/I:N/A:P
Weakness (CWE): CWE-310
EPSS score: 1.7% (77th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2022-3436)
Published: October 17, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2022-3436 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
ruby-lang / ruby
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
rubygems / rubygems
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rubygems / rubygems
rubygems / rubygems
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rubygems / rubygems
rubygems / rubygems
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rubygems / rubygems
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and 21 more…

References

http://blog.rubygems.org/2013/09/24/CVE-2013-4363.html(Patch, Vendor Advisory)
http://www.openwall.com/lists/oss-security/2013/09/14/3(Patch)
http://www.openwall.com/lists/oss-security/2013/09/18/8(Patch)
http://www.openwall.com/lists/oss-security/2013/09/20/1(Patch)
https://puppet.com/security/cve/cve-2013-4363

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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