{"id":"CVE-2026-108766","kind":"vulnerability","aliases":["CVE-2026-108766"],"related":[],"title":"Apache Kylin: missing authorization lets users change JDBC source config","description":"Missing authorization on jdbc source config update in Apache Kylin. Impact most to the kylin services that are directly exposed to public network, which is not common. In-house kylin deployments are mostly not impacted.\n\n\n\nThis issue affects Apache Kylin: from 4.0.0 through 5.0.4.\n\n\n\nUsers are recommended to upgrade to version 5.0.5, which fixes the issue.","summary":"Apache Kylin does not check authorization when updating JDBC source configuration, so a user without the right role can change those settings. The description says the impact is mainly for Kylin services directly exposed to the public network.","severity":"unknown","cvss":null,"epss":null,"exploited":false,"exploited_at":null,"products":[],"ecosystems":[],"tags":["apache-kylin","java","package","self-hosted"],"not_affected_if":["internal-network-only","not-in-version-range"],"how_to_check":"- Check the installed Kylin version and see whether it is between `4.0.0` and `5.0.4`\n- Check whether Kylin's web or REST service is reachable from the public internet","fix":"- Upgrade Apache Kylin to `5.0.5`\n- Restrict network access to Kylin services that do not need public exposure","status":"open","published_at":"2026-10-19T10:16:44+00:00","first_seen_at":"2026-10-23T21:57:17+00:00","triaged_at":"2026-10-25T05:12:41+00:00","updated_at":"2026-10-25T05:12:41+00:00","category":"package","confidence":0.6,"triage":{"at":"2026-10-25T05:12:41Z","model":"claude-haiku-5-5","output":{"fix":"- Upgrade Apache Kylin to `5.0.5`\n- Restrict network access to Kylin services that do not need public exposure","reach":"internet","title":"Apache Kylin: missing authorization lets users change JDBC source config","impact":"medium","summary":"Apache Kylin does not check authorization when updating JDBC source configuration, so a user without the right role can change those settings. The description says the impact is mainly for Kylin services directly exposed to the public network.","category":"package","nicknames":[],"who_cares":["apache-kylin","self-hosted","java"],"confidence":0.6,"needs_auth":"unknown","worst_case":"unauthorized users can modify JDBC source configuration settings","analyst_note":"Sources do not say what role or auth is needed or whether the flaw is remotely reachable without login; check the Apache Kylin security advisory for CVE-2026-108766.","how_to_check":"- Check the installed Kylin version and see whether it is between `4.0.0` and `5.0.4`\n- Check whether Kylin's web or REST service is reachable from the public internet","needs_analyst":true,"not_affected_if":["internal-network-only","not-in-version-range"],"who_is_affected":"Deployments of Apache Kylin from `4.0.0` through `5.0.4` are affected, with the highest impact on Kylin services directly exposed to the public network. The description says in-house deployments are mostly not impacted, so teams running Kylin only on internal networks are lower priority but should still upgrade.","user_interaction":"no","needs_special_setup":"unknown","severity_if_unknown":"unknown"},"cost_usd":0.000609,"input_tokens":3320,"output_tokens":554,"severity_before":"unknown"},"analyst_status":null,"analyst_note":null,"search":"'-108766':13A,16A '-2026':12A,15A '4.0.0':105C '5.0.4':107C '5.0.5':115C 'affect':101C 'apach':1A,18B,25B,71C,102C 'apache-kylin':17B 'author':4A,30B,64C 'chang':7A,44B 'check':29B 'common':89C 'config':10A,68C 'configur':35B 'cve':11A,14A 'deploy':94C 'descript':48B 'direct':57B,81C 'expos':58B,82C 'fix':117C 'host':24B 'hous':92C 'impact':51B,73C,98C 'in-hous':90C 'issu':100C,119C 'java':20B 'jdbc':8A,33B,66C 'kylin':2A,19B,26B,55B,72C,77C,93C,103C 'let':5A 'main':53B 'miss':3A,63C 'most':96C 'network':62B,85C 'packag':21B 'public':61B,84C 'recommend':110C 'right':41B 'role':42B 'say':49B 'self':23B 'self-host':22B 'servic':56B,78C 'set':46B 'sourc':9A,34B,67C 'updat':32B,69C 'upgrad':112C 'user':6A,38B,108C 'version':114C 'without':39B","nicknames":[],"mitigations":[],"who_affected":"Deployments of Apache Kylin from `4.0.0` through `5.0.4` are affected, with the highest impact on Kylin services directly exposed to the public network. The description says in-house deployments are mostly not impacted, so teams running Kylin only on internal networks are lower priority but should still upgrade.","tier":"C","verified":{},"analyst_revisit_at":null,"first_public_at":"2026-10-19T10:16:44+00:00","kev":null,"cvss_vector":null,"cvss_by":null,"poc_count":0,"sources":[{"source":"nvd","external_id":"CVE-2026-108766","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-108766","severity":null,"published_at":"2026-10-19T10:16:44+00:00","modified_at":"2026-10-19T20:46:17+00:00","first_seen_at":"2026-10-23T21:57:17+00:00","fetched_at":"2026-10-23T22:28:56+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"}