{"id":"CVE-2026-111707","published":"2026-10-16T18:17:54.803","lastModified":"2026-10-16T19:17:05.233","description":"99AI through 4.3.0 contains an insecure direct object reference vulnerability that allows unauthenticated attackers to read other users' chat messages because querySingleChat lacks an owner check. Attackers can send a fingerprint header to obtain a visitor JWT and iterate sequential chatId values to retrieve other users' message content and task data.","cvssScore":5.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","cwes":["CWE-639"],"vendors":[],"products":[],"references":[{"url":"https://github.com/vastxie/99AI","tags":[]},{"url":"https://github.com/vastxie/99AI/blob/v4.3.0/service/src/common/auth/jwtAuth.guard.ts","tags":[]},{"url":"https://github.com/vastxie/99AI/blob/v4.3.0/service/src/modules/chatLog/chatLog.service.ts#L463-L475","tags":[]},{"url":"https://hackmd.io/@hieuPenguinnn/99ai-chatlog-unauth-export-and-idor","tags":[]},{"url":"https://www.vulncheck.com/advisories/99ai-through-4.3.0-idor-via-api-chatlog-querysinglechat-chat-message-disclosure","tags":[]},{"url":"https://hackmd.io/@hieuPenguinnn/99ai-chatlog-unauth-export-and-idor","tags":[]}],"exploitRefs":[{"url":"https://github.com/vastxie/99AI","tags":[]},{"url":"https://github.com/vastxie/99AI/blob/v4.3.0/service/src/common/auth/jwtAuth.guard.ts","tags":[]},{"url":"https://github.com/vastxie/99AI/blob/v4.3.0/service/src/modules/chatLog/chatLog.service.ts#L463-L475","tags":[]}],"hasPoc":true,"ai":null}