{"id":"CVE-2026-110611","summary":"REBUILD through 4.5.0 Authorization Bypass via aibot2 Chat Endpoints chatid","details":"REBUILD through 4.5.0 contains an authorization bypass vulnerability in AiBot2Controller /aibot2 endpoints that act on a caller-supplied chatid without verifying ownership. Authenticated low-privilege users can supply another user's chatid to chat-init, chat-delete, chat-feedback, or chat-stream-stop to read, delete, exfiltrate, or interrupt AI assistant conversations.","modified":"2026-10-15T02:47:27.736698876Z","published":"2026-10-14T14:16:51.948Z","database_specific":{"cna_assigner":"VulnCheck","cwe_ids":["CWE-639"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110611.json"},"references":[{"type":"WEB","url":"https://github.com"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110611.json"},{"type":"PACKAGE","url":"https://github.com/getrebuild/rebuild"},{"type":"ARTICLE","url":"https://github.com/getrebuild/rebuild/blob/48c6cc42f9c331cc57c057fa9c66d6cbda990131/src/main/java/com/rebuild/core/aibot2/ChatManager.java#L99-L101"},{"type":"ARTICLE","url":"https://github.com/getrebuild/rebuild/blob/48c6cc42f9c331cc57c057fa9c66d6cbda990131/src/main/java/com/rebuild/web/aibot/AiBot2Controller.java#L151-L203"},{"type":"ADVISORY","url":"https://hackmd.io/@1ExmmukzRMWN7B4gQ4W-4Q/getrebuild-rebuild-aibot-chat-idor"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-110611"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/rebuild-through-4.5.0-authorization-bypass-via-aibot2-chat-endpoints-chatid"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/getrebuild/rebuild","events":[{"introduced":"0"},{"last_affected":"48c6cc42f9c331cc57c057fa9c66d6cbda990131"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"4.5.0"}],"source":"AFFECTED_FIELD"}}],"versions":["4.5.0","4.4.10","4.4.9","4.4.8","4.4.7","4.4.6","4.4.5","4.4.4","4.4.3","4.4.2","4.4.1","4.4.0","4.3.8","4.3.7","4.3.6","4.3.5","4.3.4","4.3.3","4.3.2","4.3.1","4.3.0","4.2.10","4.2.9","4.2.7","4.2.6","4.2.5","4.2.4","4.2.3","4.2.2","4.2.1","4.2.0","4.1.8","4.1.7","4.1.6","4.1.5","4.1.4","4.1.3","4.1.2","4.1.1","4.1.0","4.0.7","4.0.6","4.0.5","4.0.4","4.0.3","4.0.2","4.0.1","4.0.0","3.9.5","3.9.4","3.9.3","3.9.2","3.9.1","3.9.0","3.8.6","3.8.5","3.8.4","3.8.3","3.8.2","3.8.1","3.8.0","3.7.7","3.7.6","3.7.5","3.7.4","3.7.3","3.7.2","3.7.1","3.7.0","3.6.5","3.6.4","3.6.3","3.6.2","3.6.1","3.6.0","3.5.6","3.5.5","3.5.4","3.5.3","3.5.2","3.5.1","3.5.0","3.4.6","3.4.5","3.4.4","3.4.3","3.4.2","3.4.1","3.4.0","3.3.4","3.3.3","3.3.2","3.3.1","3.3.0","3.2.4","3.2.3","3.2.2","3.2.1","3.2.0","3.1.4","3.1.3","3.1.2","3.1.1","3.1.0","3.0.3","3.0.2","3.0.1","3.0.0","2.9.6","2.9.5","2.9.4","2.9.3","2.9.2","2.9.1","2.9.0","2.8.4","2.0.0-beta2","2.8.3","2.8.2","2.8.1","2.8.0","2.7.3","2.7.2","2.7.1","2.7.0","2.6.2","2.6.1","2.6.0","2.6.0-beta1","2.5.1","2.5.0","2.5.0-beta2","2.5.0-beta1","2.4.1","2.4.0","2.3.2","2.3.1","2.3.0","2.2.3","2.2.2","2.2.0","2.2.0-beta1","2.1.1","2.1.0","2.1.0-beta1","2.0.1","2.0.0","1.11.2","1.11.1","1.11.0","1.10.3","1.10.2","1.10.1","1.10.0","1.9.2","1.9.1","1.9.0","1.8.0","1.7.2","1.7.1","1.7.0","1.6.1-release","1.6.0-beta","1.6.0","1.5.1-release","1.5.0-beta","1.4.0-beta","1.3.0-beta","1.2.0-beta","1.1.0-beta","1.0.0-beta"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110611.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N"}]}