Log in Start free

Vulnerability · Published Dec 14, 2022 · Assigned by GitHub_M

CVE-2022-23517Inefficient Regular Expression Complexity in rails-html-sanitizer

High 7.5

In plain English

A high-severity regular-expression denial of service in rails-html-sanitizer from rails. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.6% (higher than 76% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)1.6%top 24.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12ruby-rails-html-sanitizer1.4.4-1DEBIAN-CVE-2022-23517
Debian:13ruby-rails-html-sanitizer1.4.4-1DEBIAN-CVE-2022-23517
Debian:14ruby-rails-html-sanitizer1.4.4-1DEBIAN-CVE-2022-23517
RubyGemsrails-html-sanitizer1.4.4GHSA-5x79-w82f-gw8w
Ubuntu:22.04:LTSruby-rails-html-sanitizerno fix listedUBUNTU-CVE-2022-23517
Ubuntu:24.04:LTSruby-rails-html-sanitizerno fix listedUBUNTU-CVE-2022-23517
Ubuntu:25.10ruby-rails-html-sanitizerno fix listedUBUNTU-CVE-2022-23517
Ubuntu:26.04:LTSruby-rails-html-sanitizerno fix listedUBUNTU-CVE-2022-23517
Ubuntu:26.10ruby-rails-html-sanitizerno fix listedUBUNTU-CVE-2022-23517

Affected products (as reported)

VendorProductVersions
rails rails-html-sanitizer < 1.4.4

Weakness: CWE-1333 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References