CVE-2026-83613
Description
A flaw was found in xmldom, a JavaScript module for parsing XML (Extensible Markup Language) documents. A remote attacker could exploit this vulnerability by providing a specially crafted XML document containing an element with numerous distinct attributes. The way xmldom processes these attributes leads to a significant performance degradation, consuming excessive computational resources. This can cause the application using xmldom to become unresponsive, resulting in a Denial of Service (DoS).
Statement
This is an Important denial of service vulnerability in the xmldom library, affecting Red Hat products that process untrusted XML input. The quadratic complexity in attribute processing can cause a Node.js event loop to stall when handling XML documents with numerous distinct attributes, leading to service unavailability.
Mitigation
Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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 | 7.5 | 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 | None | N/A | N/A |
| Scope | Unchanged | N/A | N/A |
| Confidentiality | None | N/A | N/A |
| Integrity Impact | None | N/A | N/A |
| Availability Impact | High | N/A | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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