AIKIDO-2026-287506
rhukster/dom-sanitizer is vulnerable to Cross-Site Scripting (XSS)
61
CVE Score
Medium
Cross-Site Scripting (XSS)
TL;DR
dom-sanitizer only walks allow-listed elements and never visits XML processing instructions, comments, or CDATA sections, so markup hidden inside <?...?>, <!--...-->, or <![CDATA[...]]> survives sanitization unescaped. When the sanitized SVG or MathML is inserted inline into an HTML page, the hidden markup becomes live and can run injected <img onerror>-style payloads. The fix walks every document node, strips processing instructions and comments, and re-serializes CDATA content as escaped text.
How do I fix this?
Upgrade the rhukster/dom-sanitizer library to the patch version.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you insert the sanitized SVG or MathML output inline into an HTML page.
Package
Versions
1.0.5 - 1.0.16
Fixed in 1.0.17Background info
rhukster/dom-sanitizer is vulnerable to Cross-Site Scripting (XSS) in versions 1.0.5 - 1.0.16.
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