xmldom up to 0.6.0/0.8.14/0.9.11 DOMParser lib/dom-parser.js DOMParser.parseFromString resource consumption

Summaryinfo

A vulnerability was found in xmldom up to 0.6.0/0.8.14/0.9.11. It has been classified as problematic. Affected by this issue is the function DOMParser.parseFromString of the file lib/dom-parser.js of the component DOMParser. This manipulation causes resource consumption. This vulnerability is tracked as CVE-2026-83613. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in xmldom up to 0.6.0/0.8.14/0.9.11. It has been declared as problematic. Affected by this vulnerability is the function DOMParser.parseFromString of the file lib/dom-parser.js of the component DOMParser. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, DOMHandler.startElement in lib/dom-parser.js inserts every parsed attribute through setAttributeNode, while NamedNodeMap.setNamedItem in lib/dom.js calls the linear getNamedItem or getNamedItemNS lookup for each insertion. A well-formed element with many distinct attributes therefore requires quadratic comparisons during DOMParser.parseFromString() and can stall a Node.js event loop before application validation. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-83613 since 08/31/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 0.8.15 or 0.9.12 eliminates this vulnerability.

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Productinfo

Name

• xmldom

Version

• 0.1
• 0.2
• 0.3
• 0.4
• 0.5
• 0.6.0
• 0.8.0
• 0.8.1
• 0.8.2
• 0.8.3
• 0.8.4
• 0.8.5
• 0.8.6
• 0.8.7
• 0.8.8
• 0.8.9
• 0.8.10
• 0.8.11
• 0.8.12
• 0.8.13
• 0.8.14
• 0.9.0
• 0.9.1
• 0.9.2
• 0.9.3
• 0.9.4
• 0.9.5
• 0.9.6
• 0.9.7
• 0.9.8
• 0.9.9
• 0.9.10
• 0.9.11

Website

• Product: https://github.com/xmldom/xmldom/

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