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CVE-2026-12975— Apicurio/apicurio-registry: apicurio-registry: unhardened saxparser in content-type detection leads to blind xxe / ssrf / billion-laughs dos

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 3版本存在输入验证错误漏洞，该漏洞源于ContentTypeUtil.isParsableXml()方法创建SAXParserFactory时未启用安全处理特性或禁用外部实体解析，可能导致具有artifact-write权限的攻击者上传特制XML文档，通过外部DTD/实体获取触发盲SSRF，或通过实体扩展导致拒绝服务

CVSS 8.5 · High EPSS 0.44% · P36

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

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-2026-12975

Vulnerability Information
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Vulnerability Title
Apicurio/apicurio-registry: apicurio-registry: unhardened saxparser in content-type detection leads to blind xxe / ssrf / billion-laughs dos
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in Apicurio Registry. The ContentTypeUtil.isParsableXml() method creates a SAXParserFactory without enabling secure processing features or disabling external entity resolution. An attacker with artifact-write permission (or unauthenticated when the registry runs with default configuration) can upload a crafted XML document to trigger blind server-side request forgery (SSRF) via external DTD/entity fetch, or cause denial of service via entity expansion.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
XML外部实体引用的不恰当限制(XXE)
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat Apicurio Registry 输入验证错误漏洞
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 3版本存在输入验证错误漏洞，该漏洞源于ContentTypeUtil.isParsableXml()方法创建SAXParserFactory时未启用安全处理特性或禁用外部实体解析，可能导致具有artifact-write权限的攻击者上传特制XML文档，通过外部DTD/实体获取触发盲SSRF，或通过实体扩展导致拒绝服务
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-2026-12975

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III. Intelligence Information for CVE-2026-12975

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Vendor Advisories for CVE-2026-12975 (2)

Other References for CVE-2026-12975 (1)

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

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-2026-12993 6.5 MEDIUM Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via
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-611

V. Comments for CVE-2026-12975

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