MEDIUM 6.9 NVD
CVE-2026-111707
99AI through 4.3.0 contains an insecure direct object reference vulnerability that allows unauthenticated attackers to read other users' chat messages because q
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.
References
- https://github.com/vastxie/99AI
- https://github.com/vastxie/99AI/blob/v4.3.0/service/src/common/auth/jwtAuth.guard.ts
- https://github.com/vastxie/99AI/blob/v4.3.0/service/src/modules/chatLog/chatLog.service.ts
- https://hackmd.io/@hieuPenguinnn/99ai-chatlog-unauth-export-and-idor
- https://www.vulncheck.com/advisories/99ai-through-4.3.0-idor-via-api-chatlog-querysinglech
This medium severity vulnerability with a CVSS score of 6.9 was published on 2026-10-16 via NVD.
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