CVE-2026-73648

rails-html-sanitizer: Possible XSS vulnerability with certain configurations

Published: Aug 13, 2026Updated: Sep 18, 2026 Sources: CVE List NVDCWE-79

N/ACVSS

NVD MITRE

Description

rails-html-sanitizer is responsible for sanitizing HTML fragments in Rails applications. From 1.0.3 until 1.7.1, Rails::HTML::PermitScrubber restricted SVG reference elements in SVG_ALLOW_LOCAL_HREF only when they used xlink:href, even though browsers also accept the plain href attribute. Applications with non-default allowed tags that included SVG use or feImage elements could therefore permit external references; a same-origin external SVG referenced by use could execute scripts in the sanitized document's context, while feImage could load external images for tracking. Applications using the default allowed tags are not affected. This issue is fixed in version 1.7.1.

No summary for this CVE yet.

Weaknesses

CWE-79

Affected Products

rails

oss-projectaka rails-html-sanitizer, activestorage

rails-html-sanitizerLibrary

OSS Libraries / web-framework

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques

Execution

Initial Access

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References

https://github.com/rails/rails-html-sanitizer/commit/74dcb8053e6da9921246ce71b06ad9fd65b19586

github.com

https://github.com/rails/rails-html-sanitizer/pull/223

github.com

https://github.com/rails/rails-html-sanitizer/releases/tag/v1.7.1

github.com

and 1 more references View all →

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