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        "state": "PUBLISHED",
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        "dateReserved": "2026-06-23T12:18:15.412Z",
        "datePublished": "2026-06-25T23:23:20.902Z",
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            "title": "Apicurio/apicurio-registry: apicurio-registry: xml entity-expansion denial of service via internal dtd subset",
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                        "attackComplexity": "LOW",
                        "attackVector": "NETWORK",
                        "availabilityImpact": "HIGH",
                        "baseScore": 6.5,
                        "baseSeverity": "MEDIUM",
                        "confidentialityImpact": "NONE",
                        "integrityImpact": "NONE",
                        "privilegesRequired": "LOW",
                        "scope": "UNCHANGED",
                        "userInteraction": "NONE",
                        "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                        "version": "3.1"
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                    "lang": "en",
                    "value": "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."
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                    "product": "Red Hat build of Apicurio Registry 3.3.1",
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                    "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2491692",
                    "name": "RHBZ#2491692",
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            "datePublic": "2026-06-10T13:00:00.000Z",
            "problemTypes": [
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                        {
                            "cweId": "CWE-776",
                            "description": "Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')",
                            "lang": "en",
                            "type": "CWE"
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            ],
            "x_redhatCweChain": "CWE-776: Improper Restriction of Recursive Entity References in DTDs ('XML Entity Expansion')",
            "timeline": [
                {
                    "lang": "en",
                    "time": "2026-05-24T00:00:00.000Z",
                    "value": "Reported to Red Hat."
                },
                {
                    "lang": "en",
                    "time": "2026-06-10T13:00:00.000Z",
                    "value": "Made public."
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                                        "Exploitation": "none"
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