A flaw was identified in the RelaxNG parser of libxml2 related to how external schema inclusions are handled. The parser does not enforce a limit on inclusion depth when resolving nested <include> directives. Specially crafted or overly complex schemas can cause excessive recursion during parsing. This may lead to stack exhaustion and application crashes, creating a denial-of-service risk.
{
"license": "CC-BY-4.0",
"sources": [
{
"html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0989",
"database_specific": {
"status": "Analyzed"
},
"modified": "2026-06-30T20:20:47.890Z",
"url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-0989",
"imported": "2026-08-09T06:30:35.805Z",
"id": "CVE-2026-0989",
"published": "2026-01-15T15:15:52.350Z"
}
]
}