{"id":"CVE-2026-102497","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102497","generatedAt":"2026-10-27T23:45:05.007Z","title":"A malicious schema with such a cycle can make the walker recurse until the stack overflows, causing a denial of service.","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.","published":"2026-09-29T12:17:10.000Z","lastModified":"2026-10-06T14:37:44.000Z","status":"Analyzed","sourceIdentifier":"security@apache.org","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-674"],"affected":["apache/xmlschema"],"epss":{"score":0.00528,"percentile":0.44409,"date":"2026-10-26","history":[{"date":"2026-09-30","score":0.00363,"percentile":0.27733}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.53%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-09-29T22:30:10.000Z","detail":{"from":null,"score":"7.5","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 7.5 HIGH."},{"kind":"new","label":"New CVE","at":"2026-09-29T12:17:10.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-09-29T12:17:09.837Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"references":[{"url":"https://lists.apache.org/thread/1cj02tobjyhjqq723bvg78yxkqt1lk7k","tags":["Mailing List","Vendor Advisory"],"source":"security@apache.org"},{"url":"http://www.openwall.com/lists/oss-security/2026/09/29/17","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102497","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}