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CVE-2023-28755

16
FAUCET Score

CVE-2023-28755 is a Regular Expression Denial of Service (ReDoS) vulnerability affecting the URI component in Ruby versions up to 3.2.1, including various Debian and Fedora distributions. This flaw allows an attacker to craft specific invalid URLs that, when parsed, significantly increase execution time, leading to a denial of service. Rated Medium severity (CVSS 5.3), it requires no user interaction or privileges, but its impact is limited to availability. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 0.10.0CPE matchmatch criteria
cpe:2.3:a:ruby-lang:uri:*:*:*:*:*:ruby:*:*
0.10.1CPE matchmatch criteria
cpe:2.3:a:ruby-lang:uri:0.10.1:*:*:*:*:ruby:*:*
0.11.0CPE matchmatch criteria
cpe:2.3:a:ruby-lang:uri:0.11.0:*:*:*:*:ruby:*:*
0.12.0CPE matchmatch criteria
cpe:2.3:a:ruby-lang:uri:0.12.0:*:*:*:*:ruby:*:*
10.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

5.3MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
1.4
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.64%
Probability of exploitation in next 30 days
EPSS Percentile
84.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0264 is in the 76th percentile among its peer group of 23,705 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (13)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ruby:3.0-8100020240522072634.489197e6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: ruby:3.1-9030020240320163942.9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: ruby-0:3.0.7-162.el9_4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Software Collections for Red Hat Enterprise Linux 7Fixed in: rh-ruby27-ruby-0:2.7.8-132.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ruby:2.7-8080020230427102918.63b34585
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ruby:2.5-8090020230627084142.b46abd14
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ruby:3.1-8090020240311122605.a75119d5
View patch
rubygemspatch availablevia ghsa
Product: uriFixed in: 0.12.1
rubygemspatch availablevia ghsa
Product: uriFixed in: 0.11.1
rubygemspatch availablevia ghsa
Product: uriFixed in: 0.10.2
rubygemspatch availablevia ghsa
Product: uriFixed in: 0.10.0.1
redhatend of lifevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: ruby:2.6/ruby
redhatend of lifevia redhat_api
Product: Red Hat Software CollectionsFixed in: rh-ruby30-ruby

Vendor Advisories (2)

rubygemsGHSA-hv5j-3h9f-99c2high

Ruby URI component ReDoS issue

Mar 31, 2023
redhatCVE-2023-28755Moderate

ruby: ReDoS vulnerability in URI

Mar 21, 2023

References

lists.debian.org / debian-lts-announce/2024/09/msg00000.html
lists.debian.org / debian-lts-announce/2025/05/msg00015.html
lists.fedoraproject.org / archives/list/[email protected]/message/27LUWREIFTP3MQAW7QE4PJM4DPAQJWXF
github.com / ruby/uri/releases
Release Notes
lists.debian.org / debian-lts-announce/2023/04/msg00033.html
Mailing ListThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/27LUWREIFTP3MQAW7QE4PJM4DPAQJWXF
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/FFZANOQA4RYX7XCB42OO3P24DQKWHEKA
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/G76GZG3RAGYF4P75YY7J7TGYAU7Z5E2T
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/QA6XUKUY7B5OLNQBLHOT43UW7C5NIOQQ
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/WMIOPLBAAM3FEQNAXA2L7BDKOGSVUT5Z
security.gentoo.org / glsa/202401-27
security.netapp.com / advisory/ntap-20230526-0003
Third Party Advisory
ruby-lang.org / en/downloads/releases
Release Notes
ruby-lang.org / en/news/2022/12/25/ruby-3-2-0-released
Release Notes
ruby-lang.org / en/news/2023/03/28/redos-in-uri-cve-2023-28755
Vendor Advisory