CVE-2026-111707 (GCVE-0-2026-111707)
Vulnerability from cvelistv5 – Published: 2026-10-16 17:39 – Updated: 2026-10-16 18:20
VLAI
EPSS
VEX
Title
99AI through 4.3.0 IDOR via /api/chatLog/querySingleChat Chat Message Disclosure
Summary
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.
Severity
5.3 (Medium)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-16 18:19 UTC
CWE
- CWE-639 - Authorization Bypass Through User-Controlled Key
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://hackmd.io/@hieuPenguinnn/99ai-chatlog-una… | third-party-advisory |
| https://github.com/vastxie/99AI/blob/v4.3.0/servi… | technical-description |
| https://github.com/vastxie/99AI/blob/v4.3.0/servi… | technical-description |
| https://github.com/vastxie/99AI | product |
| https://www.vulncheck.com/advisories/99ai-through… | third-party-advisory |
Impacted products
Date Public
2026-10-16 00:00
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