CVE-2026-12993
Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset
- State
- Published
- Severity
- 6.5 Medium
- Published
- Jun 25, 2026
- Updated
- Aug 25, 2026
- Reserved
- Jun 23, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | redhat |
Weaknesses
- CWE-776 Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')
Affected Products
| Product | Versions |
|---|---|
Red Hat build of Apicurio Registry 3.3.1Red Hat | |
Red Hat build of Apicurio Registry 3.3.1Red Hat |
References
- RHSA-2026:59360vendor-advisory
- https://access.redhat.com/security/cve/CVE-2026-12993vdb-entry
- RHBZ#2491692issue-tracking
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