xmldom Recursion Crash in XMLParser (<=0.6.0, <0.9.10)
CVE-2026-41673 Published on May 7, 2026
xmldom: Denial of service via uncontrolled recursion in XML serialization
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In @xmldom/xmldom prior to versions 0.9.10 and 0.8.13 and xmldom version 0.6.0 and prior, seven recursive traversals in lib/dom.js operate without a depth limit. A sufficiently deeply nested DOM tree causes a RangeError: Maximum call stack size exceeded, crashing the application. This issue has been patched in versions @xmldom/xmldom versions 0.9.10 and 0.8.13.
Vulnerability Analysis
CVE-2026-41673 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. An automatable proof of concept (POC) exploit exists. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality and integrity, and a high impact on availability.
Weakness Types
What is a Stack Exhaustion Vulnerability?
The product does not properly control the amount of recursion which takes place, consuming excessive resources, such as allocated memory or the program stack.
CVE-2026-41673 has been classified to as a Stack Exhaustion vulnerability or weakness.
What is a XEE Vulnerability?
The software uses XML documents and allows their structure to be defined with a Document Type Definition (DTD), but it does not properly control the number of recursive definitions of entities. If the DTD contains a large number of nested or recursive entities, this can lead to explosive growth of data when parsed, causing a denial of service.
CVE-2026-41673 has been classified to as a XEE vulnerability or weakness.
Products Associated with CVE-2026-41673
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Affected Versions
xmldom:- Version xmldom <= 0.6.0 is affected.
- Version @xmldom/xmldom >= 0.9.0, < 0.9.10 is affected.
- Version @xmldom/xmldom < 0.8.13 is affected.
Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.