6.5
Medium
CVE-2026-12993 Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset
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.
CVSS 3.1 detail
Vector CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitable remotely over the network, with an ordinary account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- Low
- Interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat build of Apicurio Registry 3 | Versions not published | |
| Red Hat build of Apicurio Registry 3.3.1 | Versions not published |
References
- RHSA-2026:59360 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2491692 bugzilla.redhat.com
Timeline
- Published
- Last modified
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