CVE-2026-111707
CVE-2026-111707 · 99AI through 4.3.0 IDOR via /api/chatLog/querySingleChat Chat Message Disclosure
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 6.9 · Medium · EPSS 0.3%
- Published
- Updated
Affected products and versions
99ai
- Versions
- ≥ 0, ≤ 4.3.0: Affected (custom)
No fix published
Original sources
- https://hackmd.io/@hieuPenguinnn/99ai-chatlog-unauth-export-and-idor
- https://github.com/vastxie/99AI/blob/v4.3.0/service/src/modules/chatLog/chatLog.service.ts#L463-L475
- https://github.com/vastxie/99AI/blob/v4.3.0/service/src/common/auth/jwtAuth.guard.ts
- https://github.com/vastxie/99AI
- https://www.vulncheck.com/advisories/99ai-through-4.3.0-idor-via-api-chatlog-querysinglechat-chat-message-disclosure
- https://nvd.nist.gov/vuln/detail/CVE-2026-111707