CVE-2026-12993

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

Published Jun 25, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Github GHSA Github GHSA GHSA-748j-wm96-4wh5 Apicurio Registry is vulnerable to denial of service through XML entity expansion
History
Type Values Removed Values Added
CPEs cpe:/a:redhat:apicurio_registry:3 cpe:/a:redhat:apicurio_registry:3.3
References
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
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.
Title Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset
First Time appeared Redhat
Redhat apicurio Registry
Weaknesses CWE-776
CPEs cpe:/a:redhat:apicurio_registry:3
Vendors & Products Redhat
Redhat apicurio Registry
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
redhat
Published
Updated
Nov 6, 2026, 4:08 AM
Reserved
Jun 23, 2026, 12:18 PM
Status
Modified
Published
Jun 26, 2026, 12:16 AM
Modified
Oct 25, 2026, 10:10 PM
Severity
Moderate
Public date
Jun 10, 2026, 1:00 PM