Vulnerability Description
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.
CVSS Score
LOW
Related Weaknesses (CWE)
References
- https://access.redhat.com/errata/RHSA-2026:7519
- https://access.redhat.com/security/cve/CVE-2026-0989
- https://bugzilla.redhat.com/show_bug.cgi?id=2429933
- https://gitlab.gnome.org/GNOME/libxml2/-/issues/998
FAQ
What is CVE-2026-0989?
CVE-2026-0989 is a vulnerability with a CVSS score of 3.7 (LOW). 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> dir...
How severe is CVE-2026-0989?
CVE-2026-0989 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-0989?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.