What’s Vulnerable › Vulnerabilities

CVE-2026-12993: Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-26 · updated 2026-10-25
• Weakness: CWE-776

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.

Affected products

• RedHat Build Of Apicurio Registry: from 3.0 through 3.2

References

• https://access.redhat.com/errata/RHSA-2026:59360
• https://access.redhat.com/security/cve/CVE-2026-12993
• https://bugzilla.redhat.com/show_bug.cgi?id=2491692

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