CVE-2026-0989

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 v3 3.7 LOW

3.7^/10

CVSS v3 : LOW

Vector :

Exploitability : 2.2 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:7519	Third Party Advisory
https://access.redhat.com/security/cve/CVE-2026-0989	Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2429933	Issue Tracking Third Party Advisory
https://gitlab.gnome.org/GNOME/libxml2/-/issues/998	Exploit Issue Tracking Mitigation Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*

Configuration 2 (hide)

OR	cpe:2.3:a:redhat:hardened_images:-:::::::*
	cpe:2.3:a:redhat:jboss_core_services:-:::::::*
	cpe:2.3:a:redhat:openshift_container_platform:4.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:6.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:7.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:8.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:9.0:::::::*
	cpe:2.3:o:redhat:enterprise_linux:10.0:::::::*

Configuration 3 (hide)

OR	cpe:2.3:a:ibm:vios::::::::
	cpe:2.3:a:ibm:vios:4.1.2.0:::::::*
	cpe:2.3:o:ibm:aix::::::::
	cpe:2.3:o:ibm:aix::::::::
	cpe:2.3:o:ibm:aix:7.3.4:::::::*

History

No history.

Information

Published : 2026-01-15 15:15

Updated : 2026-09-01 13:18

NVD link : CVE-2026-0989

Mitre link : CVE-2026-0989

CVE.ORG link : CVE-2026-0989

JSON object : View

Products Affected

redhat

enterprise_linux
openshift_container_platform
jboss_core_services
hardened_images

ibm

vios
aix

xmlsoft

libxml2

CWE

CWE-674

Uncontrolled Recursion

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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."}, {"lang": "es", "value": "Se identific\u00f3 un fallo en el analizador RelaxNG de libxml2 relacionado con la forma en que se gestionan las inclusiones de esquemas externos. El analizador no impone un l\u00edmite en la profundidad de inclusi\u00f3n al resolver directivas anidadas. Esquemas especialmente elaborados o excesivamente complejos pueden causar recursi\u00f3n excesiva durante el an\u00e1lisis. Esto puede provocar el agotamiento de la pila y ca\u00eddas de la aplicaci\u00f3n, creando un riesgo de denegaci\u00f3n de servicio."}], "lastModified": "2026-09-01T13:18:07.230", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "887B2A0E-C3C4-4AEA-8B5E-FC34BD286137", "versionEndExcluding": "2.15.2"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:redhat:hardened_images:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "87DEB507-5B64-47D7-9A50-3B87FD1E571F"}, {"criteria": "cpe:2.3:a:redhat:jboss_core_services:-:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9B453CF7-9AA6-4B94-A003-BF7AE0B82F53"}, {"criteria": "cpe:2.3:a:redhat:openshift_container_platform:4.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "932D137F-528B-4526-9A89-CD59FA1AB0FE"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "7F6FB57C-2BC7-487C-96DD-132683AEB35D"}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D65C2163-CFC2-4ABB-8F4E-CB09CEBD006C"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:ibm:vios:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0965BF55-8E7F-4AF3-9F5A-153A7BA16636", "versionEndExcluding": "4.1.1.30", "versionStartIncluding": "4.1.0"}, {"criteria": "cpe:2.3:a:ibm:vios:4.1.2.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0CAC7774-29F9-4BD9-B411-161C2D39D3FB"}, {"criteria": "cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BFCEA403-1DB8-48AE-A5C8-C65664B7D665", "versionEndExcluding": "7.2.5.12", "versionStartIncluding": "7.2.5"}, {"criteria": "cpe:2.3:o:ibm:aix:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BAED23CE-9982-46C8-8B79-8838A8F2548D", "versionEndExcluding": "7.3.3.3", "versionStartIncluding": "7.3.2"}, {"criteria": "cpe:2.3:o:ibm:aix:7.3.4:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DBAD6CAA-4E58-4401-987A-186EE9D98731"}], "operator": "OR"}]}], "sourceIdentifier": "secalert@redhat.com"}