CVE-2026-116538

HtmlSanitizer before 9.2.1039 XSS via SanitizeDom Body and HTML Attributes

Published Oct 26, 2026 CVSS 4.0 · 2.3 Low EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Mganss
Mganss htmlsanitizer
Vendors & Products Mganss
Mganss htmlsanitizer
Type Values Removed Values Added
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.
Title HtmlSanitizer before 9.2.1039 XSS via SanitizeDom Body and HTML Attributes
First Time appeared Htmlsanitizer Project
Htmlsanitizer Project htmlsanitizer
Weaknesses CWE-79
CPEs cpe:2.3:a:htmlsanitizer_project:htmlsanitizer:*:*:*:*:*:*:*:*
Vendors & Products Htmlsanitizer Project
Htmlsanitizer Project htmlsanitizer
References
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 2.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 31, 2026, 1:25 AM
Reserved
Oct 26, 2026, 2:30 PM
Status
Awaiting Analysis
Published
Oct 26, 2026, 4:17 PM
Modified
Oct 31, 2026, 2:17 AM