# CVE-2026-83610

## Summary

- **CVE ID:** CVE-2026-83610
- **Severity:** MEDIUM
- **CVSS Score:** 6.3 (CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N)
- **CWE:** CWE-116
- **Published:** Sep 1, 2026
- **Last Modified:** Sep 3, 2026

## Description

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, Document.createEntityReference(name) accepts an invalid name and the ENTITY_REFERENCE_NODE serializer emits the resulting nodeName directly in &name; form. Directly serializing the node or fragment with XMLSerializer.serializeToString() and requireWellFormed: true can therefore break the entity-reference boundary and produce attacker-controlled XML markup when reparsed. The parser does not ordinarily create these nodes, and element-child insertion is rejected, so exploitation requires an application to create and directly serialize an EntityReference. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.

## Affected Products

- xmldom — xmldom (<= 0.6.0)
- @xmldom — xmldom (>= 0.7.0, < 0.8.15)
- @xmldom — xmldom (>= 0.9.0, < 0.9.12)

## References

- [CNA](https://github.com/xmldom/xmldom/security/advisories/GHSA-6gmq-8vp8-gcm6)
- [CNA](https://github.com/xmldom/xmldom/pull/1071)
- [CNA](https://github.com/xmldom/xmldom/pull/1072)
- [CNA](https://github.com/xmldom/xmldom/commit/4664386e4f4d99d17b416a151dbe8323e245284b)
- [CNA](https://github.com/xmldom/xmldom/commit/6c3fb5ffeafe7901ec928ce9010988dd716c94a0)
- [CNA](https://github.com/xmldom/xmldom/releases/tag/0.8.15)
- [CNA](https://github.com/xmldom/xmldom/releases/tag/0.9.12)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.36%
- **EPSS Percentile:** 28.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._