Cross-Site Scripting Vulnerability in DOMPurify by Cure53
CVE-2026-75838

5.1MEDIUM

Key Information:

Vendor

Cure53

Status
Dompurify
Vendor
CVE Published:
18 August 2026

What is CVE-2026-75838?

DOMPurify versions before 3.4.13 are at risk of a cross-site scripting vulnerability related to IN_PLACE sanitization. This flaw arises when element-removal hooks inadequately neutralize detached subtrees. Consequently, attackers can insert malicious HTML containing event handlers on descendant elements. These handlers execute post-sanitization, compromising the intended safety of the output and potentially leading to unauthorized script execution.

Affected Version(s)

DOMPurify 0 < 3.4.13

DOMPurify 3.4.13

References

https://github.com/cure53/DOMPurify/security/advisories/G...
vendor-advisory
https://www.vulncheck.com/advisories/dompurify-before-cro...
third-party-advisory

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

koyokr
.