CVE-2026-75838
Description
A flaw was found in DOMPurify. This cross-site scripting vulnerability occurs during IN_PLACE sanitization, where element-removal hooks fail to neutralize detached subtrees. A remote attacker can exploit this by supplying specially crafted HTML with event handlers. This allows the execution of malicious scripts even after the HTML appears to be sanitized, leading to potential information disclosure or unauthorized actions.
Statement
This cross-site scripting flaw in DOMPurify affects Red Hat products that utilize the library for HTML sanitization. The vulnerability allows attackers to execute arbitrary JavaScript by exploiting incomplete neutralization of detached subtrees during IN_PLACE sanitization, but only when a non-default configuration involving an element-removal hook is in use and user interaction with specially crafted content occurs.
Mitigation
To mitigate this vulnerability, avoid using DOMPurify with a custom IN_PLACE sanitization configuration that includes an element-removal hook. Default DOMPurify configurations are not affected by this flaw.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 6.1 | N/A | N/A |
| Attack Vector | Network | N/A | N/A |
| Attack Complexity | Low | N/A | N/A |
| Privileges Required | None | N/A | N/A |
| User Interaction | Required | N/A | N/A |
| Scope | Changed | N/A | N/A |
| Confidentiality | Low | N/A | N/A |
| Integrity Impact | Low | N/A | N/A |
| Availability Impact | None | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
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