Allocation of Resources Without Limits or Throttling Affecting @xmldom/xmldom package, versions >=0.7.0 <0.8.15>=0.9.0-beta.1 <0.9.12
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-XMLDOMXMLDOM-19499069
- published2 Sept 2026
- disclosed1 Sept 2026
- creditEric Chiang
Introduced: 1 Sep 2026
NewCVE-2026-83615 (opens in a new tab)How to fix?
Upgrade @xmldom/xmldom to version 0.8.15, 0.9.12 or higher.
Overview
@xmldom/xmldom is a javascript ponyfill to provide the following APIs that are present in modern browsers to other runtimes. Since version 0.7.0 this package is published to npm as @xmldom/xmldom and no longer as xmldom
Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling through the appendElement function in lib/sax.js when handling XML documents with deeply nested elements that declare new namespace prefixes. An attacker can cause excessive memory consumption by submitting specially crafted XML input that leads to quadratic growth in namespace-map storage, potentially resulting in process heap exhaustion.