CVE-2026-12993: Apicurio Registry is vulnerable to denial of service through XML entity expansion
(updated )
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.
References
- access.redhat.com/errata/RHSA-2026:59360
- access.redhat.com/security/cve/CVE-2026-12993
- bugzilla.redhat.com/show_bug.cgi?id=2491692
- github.com/Apicurio/apicurio-registry/commit/03cd1cc081d9b1b4c8b9a59330ff4c980dc68b73
- github.com/Apicurio/apicurio-registry/commit/48369d0e9008f7aab16dce5970c1ecbdd55e9aa5
- github.com/Apicurio/apicurio-registry/issues/8189
- github.com/Apicurio/apicurio-registry/pull/8200
- github.com/Apicurio/apicurio-registry/releases/tag/3.3.1
- github.com/Apicurio/apicurio-registry/releases/tag/v3.2.6
- github.com/advisories/GHSA-748j-wm96-4wh5
- nvd.nist.gov/vuln/detail/CVE-2026-12993
Code Behaviors & Features
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