CVE-2026-116538
Published:October 26, 2026
Updated:October 29, 2026
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.
Affected Packages
HtmlSanitizer (DOT_NET):
Affected version(s) >=9.0.873.0 <9.2.1039Fix Suggestion:
Update to version 9.2.1039https://github.com/mganss/HtmlSanitizer.git (GITHUB):
Affected version(s) >=v9.0.873 <v9.2.1039Fix Suggestion:
Update to version v9.2.1039htmlsanitizer (NUGET):
Affected version(s) >=9.0.873 <9.2.1039Fix Suggestion:
Update to version 9.2.1039Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
2.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
PASSIVE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
NONE
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
4.7
Attack Vector
NETWORK
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Improper Neutralization of Input During Web Page Generation
EPSS
Base Score:
0.29