CVE-2026-0989
Libxml2: unbounded relaxng include recursion leading to stack overflow
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.
No summary for this CVE yet.
CVSS Vector Breakdown
Exploitability
AV:NAttack VectorNetwork
AC:HAttack ComplexityHigh
PR:NPrivileges RequiredNone
UI:NUser InteractionNone
Scope
S:UScopeUnchanged
Impact
C:NConfidentialityNone
I:NIntegrityNone
A:LAvailabilityLow
Weaknesses
Affected Products
Red Hat
commercial·USaka redhat
ibm
commercial·USaka international business machines
xmlsoft
oss-projectaka libxslt, libxml2
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
АО «ИВК»
commercial·RUaka ivk
and 8 more affected products View all →
Exploitability
Official Patch Available
Workaround Available
Attack Graph
Products CVE Techniques Tactics
Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.
MITRE ATT&CK
1 technique Impact
References
https://access.redhat.com/errata/RHSA-2026:7519
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-0989
access.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2429933
bugzilla.redhat.com
and 8 more references View all →
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