Low
Libxml2: unbounded relaxng include recursion leading to stack overflow
Type: advisorySources: OSV
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 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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-0989
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 10:12 UTC · Revision 1
Source evidence
Libxml2: unbounded relaxng include recursion leading to stack overflow
core-osv · Original sourcePublished 15 Jan 2026, 14:20 UTC
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 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.
osv:CVE-2026-0989
Complete source record
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"title": "Libxml2: unbounded relaxng include recursion leading to stack overflow",
"summary": "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 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.",
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"modified": "2026-10-28T02:30:27.651400343Z",
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"references": [
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