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CVE-2022-23517

Inefficient Regular Expression Complexity in rails-html-sanitizer

Published: Dec 14, 2022Updated: Nov 3, 2025 Sources: CVE List NVD GHSA BDUCWE-1333
NVD MITRE
7.5CVSSHIGH
EPSS Score
1.5%
Top 30.0%
CISA KEV
Not in KEV
Exploits
1 Known
Remediation
Patch Available

Description

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. Certain configurations of rails-html-sanitizer < 1.4.4 use an inefficient regular expression that is susceptible to excessive backtracking when attempting to sanitize certain SVG attributes. This may lead to a denial of service through CPU resource consumption. This issue has been patched in version 1.4.4.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
Open in CVSS calculator →

Weaknesses

CWE-1333

Affected Products

rails html sanitizersrubyonrailsOSS Libraries
debian linuxdebian
On-premOS
Operating Systems / linux-distro
rails-html-sanitizerRubyGemsOSS Libraries
rails-html-sanitizerrails
Library
OSS Libraries / web-framework
РЕД ОСООО «Ред Софт»
On-premOS
Operating Systems / linux-distro
rubyonrailsoss-projectUSOSS Librariesaka rails, ruby on rails, rubyonrails.org
debianoss-projectGBOperating Systemsaka debian gnu/linux
rubygemspackage-ecosystemOSS Libraries
railsoss-projectOSS Librariesaka rails-html-sanitizer, activestorage
ооо «ред софт»commercialRUOperating Systemsaka red soft
and 2 more affected products View all →

Attack Graph

Products CVE Techniques Tactics

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Exploitability

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details
Official Patch Available

MITRE ATT&CK

1 technique
Impact
View detailed technique mapping

References

https://github.com/rails/rails-html-sanitizer/commit/56c61c0cebd1e493e8ad7bca2a0191609a4a6979
github.com
https://github.com/rails/rails-html-sanitizer/security/advisories/GHSA-5x79-w82f-gw8w
github.com
https://hackerone.com/reports/1684163
hackerone.com
and 9 more references View all →

Timeline

Published
Dec 14, 2022
Last Updated
Nov 3, 2025

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