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Fencer Vulns
high 7.5

CVE-2022-23517 json

Inefficient Regular Expression Complexity in rails-html-sanitizer

published 2022-12-13 3 y ago modified 2026-06-17 4 mo ago also GHSA-5x79-w82f-gw8w , EUVD-2022-7520

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.6%
EPSS 1.6% chance of exploitation in 30 days, percentile 75%
public exploits
0
none known

Summary

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.

Patch / fix

  • rubygems rails-html-sanitizer 1.4.4
  • rubyonrails rails_html_sanitizers 1.4.4
  • ruby-rails-html-sanitizer Debian 14, Debian 13, Debian 12 1.4.4-1

debian advisories DEBIAN-CVE-2022-23517

  • cjson satellite capsule 6.13, satellite 6.13 1.7.14-5.el8sat
  • foreman satellite utils 6.13, satellite capsule 6.13, satellite 6.13 3.5.1.14-1.el8sat
  • katello satellite capsule 6.13, satellite 6.13 4.7.0-1.el8sat
  • libsolv satellite capsule 6.13, satellite 6.13 0.7.22-4.el8pc
  • libcomps satellite capsule 6.13, satellite 6.13 0.1.18-4.el8pc
  • qpid-cpp satellite capsule 6.13, satellite 6.13 1.39.0-7.el8amq
  • qpid-qmf satellite capsule 6.13, satellite 6.13 1.39.0-7.el8amq
  • candlepin satellite 6.13 4.2.13-1.el8sat

red hat advisories RHSA-2023:2097

  • rubygem-rails-html-sanitizer SLE High Availability Extension 15 SP5, SLE High Availability Extension 15 SP4, SLE High Availability Extension 15 SP3 +4 more 1.0.4-150000.4.6.1
  • rubygem-rails-html-sanitizer OpenStack Cloud Crowbar 9, OpenStack Cloud Crowbar 8 1.0.3-8.14.1

suse advisories SUSE-SU-2023:3714-1SUSE-SU-2023:3534-1

  • rubygem-rails-html-sanitizer openSUSE Tumbleweed 1.6.0-1.9
  • rubygem-rails-html-sanitizer openSUSE Tumbleweed 1.6.0-1.7
  • rubygem-rails-html-sanitizer openSUSE Tumbleweed 1.6.0-1.5
  • rubygem-rails-html-sanitizer openSUSE Tumbleweed 1.5.0-1.1

opensuse advisories openSUSE-SU-2026:10361-1openSUSE-SU-2025:15125-1openSUSE-SU-2024:14175-1openSUSE-SU-2024:12769-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-23517 updated cvss 7.5

rubygem-rails-html-sanitizer: Inefficient Regular Expression leading to denial of service

  • Red Hat 3scale API Management Platform 2 3scale-amp2/zync-rhel8
    affected: no fix planned “Will not fix”
  • Red Hat Satellite 6 tfm-rubygem-rails-html-sanitizer, tfm-ror51-rubygem-rails-html-sanitizer, tfm-ror52-rubygem-rails-html-sanitizer
    affected: no fix available, no fix planned “Out of support scope”
  • Red Hat Satellite 6.13 for RHEL 8 rubygem-rails-html-sanitizer 1.4.4-1.el8sat
    fixed: vendor fix RHSA-2023:2097
  • Red Hat Satellite 6.13 for RHEL 8 cjson 1.7.14-5.el8sat, katello 4.7.0-1.el8sat, libsolv 0.7.22-4.el8pc, libcomps 0.1.18-4.el8pc, python-idna 3.3-2.el8pc, python-pbr 5.8.0-4.el8pc, +670 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

1.58% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
rubygems rails-html-sanitizer
<1.4.4
1.4.4

Affected products

  • rails rails-html-sanitizer

Classification

Weakness
  • CWE-1333 Inefficient Regular Expression Complexity
Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.