CVE-2026-116538
Medium
Description
HtmlSanitizer before 9.2.1039 and 10.0 prereleases before 10.0.1037-beta contains a cross-site scripting vulnerability because SanitizeDom(string) never sanitizes attributes on the html and body wrapper elements. Attackers can supply input with a second body or html tag carrying event handlers like onload, executing script when applications render serialized document or body outer HTML.
SeverityMedium
CVSS4.7
Exploit probability—
ProductHtmlSanitizer
PublishedOct 26, 2026
First seenOct 26, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- mganss HtmlSanitizer9.2.1039, 10.0.1037-beta or later
Patches
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mganss HtmlSanitizer | v < 9.2.1039, 10.0.0-beta ≤ v < 10.0.1037-beta | 9.2.1039, 10.0.1037-beta |
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