{"id":"CVE-2026-64610","kind":"vulnerability","aliases":["CVE-2026-64610"],"related":[],"title":"Deserialization of Untrusted Data vulnerability in Apache Kylin","description":"Deserialization of Untrusted Data vulnerability in Apache Kylin. Unsafe Java deserialization could happen from a broken external cache service.\n\n\n\nThis issue affects Apache Kylin: from 4 through 5.0.4.\n\n\n\nUsers are recommended to upgrade to version 5.0.5, which fixes the issue.","summary":"Apache Kylin versions 4 through 5.0.4 deserialize untrusted Java objects from an external cache service. An attacker who can make the cache service return crafted data can run code on the Kylin server.","severity":"critical","cvss":9.8,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apache-kylin","java","package","self-hosted"],"not_affected_if":["default-config"],"how_to_check":"Check the deployed Kylin version in the installed package or release files; affected if it is 4.x through 5.0.4.\nIf an external cache service is configured for Kylin, note its host and who can write to it.","fix":"Upgrade Apache Kylin to version 5.0.5.\nUntil then, restrict who can write to the external cache service (unknown whether this is a complete mitigation).","status":"open","published_at":"2026-10-16T13:16:57+00:00","first_seen_at":"2026-10-23T21:57:13+00:00","triaged_at":"2026-10-23T22:05:08+00:00","updated_at":"2026-10-23T22:28:55+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-23T22:05:08Z","model":"claude-haiku-5-5","output":{"fix":"Upgrade Apache Kylin to version 5.0.5.\nUntil then, restrict who can write to the external cache service (unknown whether this is a complete mitigation).","reach":"network","impact":"high","summary":"Apache Kylin versions 4 through 5.0.4 deserialize untrusted Java objects from an external cache service. An attacker who can make the cache service return crafted data can run code on the Kylin server.","category":"package","who_cares":["apache-kylin","java","self-hosted"],"confidence":0.6,"needs_auth":"unknown","worst_case":"Attacker runs code on the Kylin server via deserialization.","analyst_note":"Sources do not say which cache service configuration triggers the flaw or how to check for it; read the Apache Kylin 5.0.5 release notes or the NVD entry for the vulnerable setting.","how_to_check":"Check the deployed Kylin version in the installed package or release files; affected if it is 4.x through 5.0.4.\nIf an external cache service is configured for Kylin, note its host and who can write to it.\nunknown","needs_analyst":true,"not_affected_if":["default-config"],"user_interaction":"no","needs_special_setup":"yes","severity_if_unknown":"critical"},"cost_usd":0.000492,"input_tokens":2768,"output_tokens":430,"severity_before":"critical"},"analyst_status":null,"analyst_note":null,"search":"'-2026':10A,13A '-64610':11A,14A '4':26B,81C '5.0.4':28B,83C '5.0.5':91C 'affect':77C 'apach':7A,16B,23B,62C,78C 'apache-kylin':15B 'attack':39B 'broken':71C 'cach':36B,44B,73C 'code':51B 'could':67C 'craft':47B 'cve':9A,12A 'data':4A,48B,59C 'deseri':1A,29B,56C,66C 'extern':35B,72C 'fix':93C 'happen':68C 'host':22B 'issu':76C,95C 'java':18B,31B,65C 'kylin':8A,17B,24B,54B,63C,79C 'make':42B 'object':32B 'packag':19B 'recommend':86C 'return':46B 'run':50B 'self':21B 'self-host':20B 'server':55B 'servic':37B,45B,74C 'unsaf':64C 'untrust':3A,30B,58C 'upgrad':88C 'user':84C 'version':25B,90C 'vulner':5A,60C","nicknames":[],"mitigations":[],"who_affected":null,"tier":null,"verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-16T13:16:57+00:00","kev":null,"cvss_vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvss_by":"134c704f-9b21-4f2e-91b3-4a467353bcc0","poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-64610","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64610","severity":null,"published_at":"2026-10-16T13:16:57+00:00","modified_at":"2026-10-20T17:17:41+00:00","first_seen_at":"2026-10-23T21:57:13+00:00","fetched_at":"2026-10-23T22:28:55+00:00","note":null}],"documents":[],"notice":"Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai"}