CVE-2026-12993

A flaw was found in Apicurio Registry. The DocumentBuilderAccessor correctly blocks external DTD and schema access but does not disable DOCTYPE declarations or enable FEATURE_SECURE_PROCESSING. An attacker with artifact-write permission can upload XML documents with internal entity-expansion payloads (billion-laughs variant) that cause CPU and heap exhaustion, partially mitigated by the JAXP default 64,000 entity-expansion limit.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/errata/RHSA-2026:59360
https://access.redhat.com/security/cve/CVE-2026-12993	Vendor Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2491692	Issue Tracking Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:redhat:build_of_apicurio_registry:*:*:*:*:*:*:*:*

History

25 Oct 2026, 22:10

Type	Values Removed	Values Added
Summary		(es) Se encontró una vulnerabilidad en Apicurio Registry. El DocumentBuilderAccessor bloquea correctamente el acceso a DTD y esquemas externos, pero no deshabilita las declaraciones DOCTYPE ni habilita FEATURE_SECURE_PROCESSING. Un atacante con permiso de escritura de artefactos puede cargar documentos XML con cargas útiles de expansión de entidades internas (variante billion-laughs) que causan agotamiento de CPU y de la memoria heap, parcialmente mitigado por el límite predeterminado de JAXP de 64.000 expansiones de entidades.

Information

Published : 2026-06-26 00:16

Updated : 2026-10-25 22:10

NVD link : CVE-2026-12993

Mitre link : CVE-2026-12993

CVE.ORG link : CVE-2026-12993

JSON object : View

Products Affected

redhat

build_of_apicurio_registry

CWE

CWE-776

Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')

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