Rails::Html::Sanitizer vulnerable to Cross-site Scripting

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

6.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

EPSS

• CVE-2022-32209: 30.23% estimated exploitation activity in the next 30 days; percentile 98.22 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Versions of Rails::Html::Sanitizer prior to version 1.4.3 are vulnerable to XSS with certain configurations of Rails::Html::Sanitizer which allows an attacker to inject content when the application developer has overridden the sanitizer's allowed tags to allow both select and style elements. Code is only impacted if allowed tags are being overridden. This may be done via application configuration: see https://guides.rubyonrails.org/configuring.html#configuring-action-view Or it may be done with a :tags option to the Action View helper sanitize: see https://api.rubyonrails.org/classes/ActionView/Helpers/SanitizeHelper.html#method-i-sanitize It may also be done with Rails::Html::SafeListSanitizer directly: or with All users overriding the allowed tags by any of the above mechanisms to include both "select" and "style" are recommended to upgrade immediately. A workaround for this issue can be applied by removing either select or style from the overridden allowed tags.

Published by the source

25 Jun 2022, 00:00 UTC

Last modified by the source

4 Nov 2025, 16:39 UTC

Source last checked

26 Oct 2026, 15:51 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-pg8v-g4xq-hww9

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# Patch Next advisory brief: CVE-2022-32209

Advisory: Rails::Html::Sanitizer vulnerable to Cross-site Scripting
IDs: CVE-2022-32209, GHSA-pg8v-g4xq-hww9
Record: https://patchnext.com/advisories/cve-2022-32209 (revision 1, source checked 26 Oct 2026, 15:51 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: rails-html-sanitizer 1.4.3. A vendor fix does not mean a deployment is fixed.

## Affected components
- RubyGems rails-html-sanitizer: affected < 1.4.3; fixed in 1.4.3

## Suggested inspection (read-only)
- RubyGems rails-html-sanitizer: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on rails-html-sanitizer.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-pg8v-g4xq-hww9 (GitHub-reviewed advisory GHSA-pg8v-g4xq-hww9 lists affected ranges: RubyGems rails-html-sanitizer >=0 <1.4.3)

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