{"id":"CVE-2026-12993","title":"A flaw was found in Apicurio Registry","summary":"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 …","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-776"],"vendor":"redhat","product":"build_of_apicurio_registry","affected":["build_of_apicurio_registry >= 3.0, <= 3.2"],"published":"2026-06-26","updated":"2026-08-25","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-12993","references":[{"url":"https://access.redhat.com/errata/RHSA-2026:59360","label":"secalert@redhat.com"},{"url":"https://access.redhat.com/security/cve/CVE-2026-12993","label":"secalert@redhat.com"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2491692","label":"secalert@redhat.com"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12993.json"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-12993"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-12993"}],"tags":["nvd","csaf","vex","red-hat"],"epss":0.00519,"epssPercentile":0.43118,"ingestedAt":"2026-08-26T13:44:27.621Z","patched":["build_of_apicurio_registry 3.3.1"],"slug":"CVE-2026-12993","body":"## Overview\n\nA 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.\n\n## Affected\n\n- `build_of_apicurio_registry >= 3.0, <= 3.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2026:59360** · Red Hat · fixed in: Red Hat build of Apicurio Registry 3.3.1 · released 2026-08-25 · [advisory](https://access.redhat.com/errata/RHSA-2026:59360)","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}