{"id":"CVE-2026-102497","state":"PUBLISHED","title":"Apache XMLSchema: Denial of service through cyclic schema definitions in the schema walker","description":"The Apache XmlSchema walker (xmlschema-walker) doesn't detect cycles in type derivation, substitution groups, model groups or attribute groups. A malicious schema with such a cycle can make the walker recurse until the stack overflows, causing a denial of service.\n\nUsers are recommended to upgrade to version 2.3.3, which fixes this issue.","publishedAt":"2026-09-29T11:34:17.292Z","updatedAt":"2026-09-29T20:13:56.826Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"apache","products":["Apache Software Foundation Apache XMLSchema"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache XMLSchema","packageName":"org.apache.ws.xmlschema:xmlschema-walker","packageURL":"pkg:maven/org.apache.ws.xmlschema/xmlschema-walker","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.3.3","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":["https://lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k","http://www.openwall.com/lists/oss-security/2026/09/29/17"],"weaknesses":["CWE-674"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102497.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102497","state":"PUBLISHED","datePublished":"2026-09-29T11:34:17.292Z","dateUpdated":"2026-09-29T20:13:56.826Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-09-29T10:42:55.336Z"},"containers":{"cna":{"title":"Apache XMLSchema: Denial of service through cyclic schema definitions in the schema walker","descriptions":[{"lang":"en","value":"The Apache XmlSchema walker (xmlschema-walker) doesn't detect cycles in type derivation, substitution groups, model groups or attribute groups. A malicious schema with such a cycle can make the walker recurse until the stack overflows, causing a denial of service.\n\nUsers are recommended to upgrade to version 2.3.3, which fixes this issue."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache XMLSchema","packageName":"org.apache.ws.xmlschema:xmlschema-walker","packageURL":"pkg:maven/org.apache.ws.xmlschema/xmlschema-walker","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.3.3","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":[{"url":"https://lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k","tags":["vendor-advisory"]}],"metrics":[{"other":{"type":"Textual description of severity","content":{"text":"low"}},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-09-29T11:34:17.292Z"},"source":{"discovery":"UNKNOWN"},"credits":[{"lang":"en","value":"This issue was found using Claude agents to study the security of open-source projects","type":"finder"}],"x_generator":{"engine":"Vulnogram 1.0.3"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/09/29/17"}],"providerMetadata":{"shortName":"CVE","orgId":"af854a3a-2127-422b-91ae-364da2661108","dateUpdated":"2026-09-29T12:11:28.071Z"}},{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":7.5,"attackVector":"NETWORK","baseSeverity":"HIGH","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T20:13:25.311609Z","id":"CVE-2026-102497","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-674","type":"CWE","lang":"en","description":"CWE-674 Uncontrolled Recursion"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-29T20:13:56.826Z"}}]}}}