CVE-2026-111706: Missing Authentication for Critical Function in vastxie 99AI
Description
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.
CVSS v4.0
Score 8.7high
Affected software
vastxie
99AI
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-111706 describes a missing authentication vulnerability in the vastxie 99AI product through version 4.3.0. Specifically, the POST /api/chatLog/exportExcel route does not require authentication, enabling unauthenticated attackers to export chat logs of all users. Attackers can manipulate request parameters such as page, size, and email to download XLSX files containing sensitive user data including usernames, emails, prompts, and AI responses. The vulnerability has a CVSS 4.0 score of 8.7, indicating high severity with network attack vector, no privileges required, no user interaction, and high impact on confidentiality.
Potential Impact
An attacker can remotely and without authentication access and download sensitive user chat logs, exposing usernames, emails, prompts, and AI-generated answers. This leads to a significant confidentiality breach affecting all users of the vulnerable versions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch or official fix is available, restrict access to the /api/chatLog/exportExcel endpoint through network controls or authentication proxies to prevent unauthenticated access.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-10-16T14:31:22.547Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6ad2641b2cdf04f656199d33
Added to database: 10/16/2026, 17:51:23 UTC
Last enriched: 10/16/2026, 18:04:16 UTC
Last updated: 10/16/2026, 23:10:50 UTC
Views: 6
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