CVE-2013-4363

mediumpriority · track · 18EPSS 0.017 · 77 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.69% (77th) EPSS

CVSS 4.3 · medium

Is it mine?

53 products

Check your exposure

Who says so?

4 sources

cnnvd · enisa_euvd · nvd · osv

EPSS · scored 2026-10-27

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.

cvss

Technical severity, 0–10. One row per scoring source.

4.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 3.7–4.3

v2.04.3mediumAV:N/AC:M/Au:N/C:N/I:N/A:Pprimary · NVD / NIST USexploitability 8.6 · impact 2.9

v2.03.7lowAV:N/AC:M/Au:N/C:N/I:N/A:P/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-310USprimary

affected products (53)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
ruby-lang ruby= 1.9nvdUScpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby= 1.9.1nvdUScpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby= 1.9.2nvdUScpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby= 1.9.3nvdUScpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby= 2.0nvdUScpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
ruby-lang ruby= 2.0.0nvdUScpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*
rubygems rubygems≤ 1.8.23nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.0nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.1nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.10nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.11nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.12nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.13nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.14nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.15nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.16nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.17nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.18nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*
rubygems rubygems= 1.8.19nvdUScpe:2.3:a:rubygems:rubygems:*:*:*:*:*:*:*:*

showing 20 of 53

advisories (1)

Vendor and ecosystem advisories describing this.

GHSA-9qvm-2vhf-q649RubyGems Regular Expression Denial of Service2022-05-17ghsa · osvUS
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.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd osv NVD CVE.org MITRE

published 2013-10-17modified 2026-06-16

related (2,920)

Related entries.

ID	severity	EPSS	exploitable	published
CVE-2020-1464US	low2.1OT critical	38.9% (99th)	KEV	2020-08-17
A spoofing vulnerability exists when Windows incorrectly validates file signatures. An attacker who successfully exploited this vulnerability could bypass security features and loa…
CVE-2013-7331US	medium4.3OT critical	50.2% (99th)	KEV	2014-02-26
The Microsoft.XMLDOM ActiveX control in Microsoft Windows 8.1 and earlier allows remote attackers to determine the existence of local pathnames, UNC share pathnames, intranet hostn…
CVE-2013-3900US	high7.6OT critical	44.6% (99th)	KEV	2013-12-11
Why is Microsoft republishing a CVE from 2013? We are republishing CVE-2013-3900 in the Security Update Guide to update the Security Updates table and to inform customers that the…
CVE-2014-8684US	critical9.8	71.7% (99th)	Exploit	2017-09-19
CodeIgniter before 3.0 and Kohana 3.2.3 and earlier and 3.3.x through 3.3.2 make it easier for remote attackers to spoof session cookies and consequently conduct PHP object injecti…
CVE-2016-2107US	medium5.9	89.1% (100th)	Exploit	2016-05-05
The AES-NI implementation in OpenSSL before 1.0.1t and 1.0.2 before 1.0.2h does not consider memory allocation during a certain padding check, which allows remote attackers to obta…

+2915 more

references (15)

External citations — patches, advisories, analysis.

scry

Attackers weaponise vulnerabilities like this against internet-exposed services. See what is exposed on your perimeter with a free passive scan.

Free scan