CVE-2026-12993: medium-severity vulnerability in Red Hat build of Apicurio Registry 3.3.1
Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset
Published · Updated
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 6.5epss 0.5%
exploitation probability
0.5%top 58% of all CVEs
observed exploitation
nono source reports it
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/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
Red Hat · Red Hat build of Apicurio Registry 3.3.1Related CVEs — Red Hat build of Apicurio Registry 3.3.1
In the same product, most dangerous first.