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CVE-2026-12993— Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset

Quick assessment

Affected
Red Hat Red Hat build of Apicurio Registry 3.3.1
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Red Hat Apicurio Registry是美国Red Hat公司的一款用于管理与版本控制API模式与事件数据结构的开源注册中心。 Red Hat Apicurio Registry存在资源管理错误漏洞，该漏洞源于DocumentBuilderAccessor未禁用DOCTYPE声明且未启用FEATURE_SECURE_PROCESSING，具有artifact-write权限的攻击者可上传包含内部实体扩展有效载荷（billion-laughs变体）的XML文档，导致CPU和堆耗尽。

CVSS 6.5 · Medium EPSS 0.52% · P42

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 2

VendorProduct Version RangeStatus
Red Hat Red Hat build of Apicurio Registry 3.3.1 any unaffected
any unaffected
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I. Basic Information for CVE-2026-12993

Vulnerability Information
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Vulnerability Title
Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
DTD中递归实体索引的不恰当限制(XML实体扩展)
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Apicurio Registry 资源管理错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat Apicurio Registry是美国Red Hat公司的一款用于管理与版本控制API模式与事件数据结构的开源注册中心。 Red Hat Apicurio Registry存在资源管理错误漏洞，该漏洞源于DocumentBuilderAccessor未禁用DOCTYPE声明且未启用FEATURE_SECURE_PROCESSING，具有artifact-write权限的攻击者可上传包含内部实体扩展有效载荷（billion-laughs变体）的XML文档，导致CPU和堆耗尽。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat build of Apicurio Registry 3.3.1 - cpe:/a:redhat:apicurio_registry:3.3
Red Hat Red Hat build of Apicurio Registry 3.3.1 - cpe:/a:redhat:apicurio_registry:3.3

II. Public POCs for CVE-2026-12993

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III. Intelligence Information for CVE-2026-12993

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Vendor Advisories for CVE-2026-12993 (2)

Other References for CVE-2026-12993 (1)

Same Patch Batch · Red Hat · 2026-06-25 · 13 CVEs total

CVE-2026-12975 8.5 HIGH Apicurio/apicurio-registry: apicurio-registry: unhardened saxparser in content-type detect
CVE-2026-9800 8.1 HIGH Keycloak-policy-enforcer: keycloak policy enforcer: authorization bypass via incorrect uri
CVE-2026-11800 8.1 HIGH Org.keycloak:keycloak-services: keycloak: authentication bypass via jwt algorithm confusio
CVE-2026-9099 7.7 HIGH Keycloak: group-admin escalation to realm-admin
CVE-2026-12992 7.4 HIGH Apicurio/apicurio-registry: apicurio-registry: ssrf via wsdl4j import dereference in wsdl
CVE-2026-9086 7.3 HIGH Keycloak: keycloak: cross-site scripting (xss) via case-insensitive uri validation bypass
CVE-2026-13083 6.9 MEDIUM Pen-drive: pen-drive: stored xss via unescaped cluster data in html report
CVE-2026-9705 6.5 MEDIUM Keycloak: keycloak: attacker can re-enable and take over disabled clients via registration
CVE-2026-13318 6.4 MEDIUM Virt-api-rhel9: kubevirt: kubevirt: ssrf in virt-api port-forward via unvalidated guest-ag
CVE-2026-9083 4.9 MEDIUM Keycloak: keycloak: information disclosure through arbitrary filesystem path probing
CVE-2026-9799 4.6 MEDIUM Keycloak: keycloak: unauthorized access to resources via uma permission ticket bypass
CVE-2026-13218 4.2 MEDIUM Kubevirt: kubevirt: symlink following in writetocachedfile allows host file overwrite from

IV. Related Vulnerabilities

Same product: Red Hat build of Apicurio Registry 3.3.1
Same vendor: Red Hat
Same weakness: CWE-776

V. Comments for CVE-2026-12993

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