Auth bypass in Vastxie 99ai
CVE-2026-111706
99AI through 4.3.0 contains a missing authentication vulnerability in the POST /api/chatLog/exportExcel route that allows unauthenticated attackers to export all users' chat logs. Attackers can send requests with controlled page, size, and optional email fields to download xlsx files containing usernames, emails, prompts, and AI answers.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- hackmd.io/@hieuPenguinnn/99ai-chatlog-unauth-export-and-idor (third-party-advisory)
- github.com/vastxie/99AI/blob/v4.3.0/service/src/modules/chatLog/chatLog.control… (technical-description)
- github.com/vastxie/99AI/blob/v4.3.0/service/src/modules/chatLog/chatLog.service… (technical-description)
- github.com/vastxie/99AI (product)
- VulnCheck Advisory: 99AI through 4.3.0 Unauthenticated Information Disclosure via chatLog exportExcel (third-party-advisory)
Frequently asked questions
- What is CVE-2026-111706?
- CVE-2026-111706 is a high-severity vulnerability in Vastxie 99ai, classified under Missing Authentication for Critical Function. CVSS score: 7.5/10. Published 2026-10-16.
- How severe is CVE-2026-111706?
- High severity. CVSS v3 base score is 7.5 out of 10.