---
id: CVE-2026-111706
title: >-
  99AI through 4.3.0 Unauthenticated Information Disclosure via chatLog
  exportExcel
summary: >-
  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,
  a…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cvssSource: cna
cwe:
  - CWE-306
vendor: vastxie
product: 99AI
affected:
  - 99AI <= 4.3.0
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-16T20:52:41.729124Z'
published: '2026-10-16'
updated: '2026-10-16'
sourceUpdated: '2026-10-16T21:16:51.203Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-111706'
references:
  - url: 'https://hackmd.io/@hieuPenguinnn/99ai-chatlog-unauth-export-and-idor'
  - url: >-
      https://github.com/vastxie/99AI/blob/v4.3.0/service/src/modules/chatLog/chatLog.controller.ts#L47-L52
  - url: >-
      https://github.com/vastxie/99AI/blob/v4.3.0/service/src/modules/chatLog/chatLog.service.ts#L104-L155
  - url: 'https://github.com/vastxie/99AI'
  - url: >-
      https://www.vulncheck.com/advisories/99ai-through-4.3.0-unauthenticated-information-disclosure-via-chatlog-exportexcel
    label: >-
      VulnCheck Advisory: 99AI through 4.3.0 Unauthenticated Information
      Disclosure via chatLog exportExcel
tags:
  - cve.org
ingestedAt: '2026-10-16T18:43:08.651Z'
---

## Overview

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.

## Affected

- `99AI <= 4.3.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.