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CVE-2026-111707— 99AI through 4.3.0 IDOR via /api/chatLog/querySingleChat Chat Message Disclosure

Quick assessment

Affected
vastxie 99AI
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

99AI 4.3.0 及更早版本存在不安全直接对象引用（IDOR）漏洞。由于 函数缺少所有权验证，未认证的攻击者可以读取其他用户的聊天消息。攻击者可通过发送指纹（fingerprint）请求头获取访客 JWT，随后遍历连续的 值，从而窃取其他用户的消息内容及任务数据。

CVSS 5.3 · Medium

Affected Version Matrix 1

VendorProduct Version RangeStatus
vastxie 99AI ≤ 4.3.0 affected
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I. Basic Information for CVE-2026-111707

Vulnerability Information
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Vulnerability Title
99AI through 4.3.0 IDOR via /api/chatLog/querySingleChat Chat Message Disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vastxie 99AI 0 ~ 4.3.0 -

II. Public POCs for CVE-2026-111707

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III. Intelligence Information for CVE-2026-111707

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Vendor Advisories for CVE-2026-111707 (1)

Security Blog Posts for CVE-2026-111707 (1)

Vendor Pages for CVE-2026-111707 (1)

IV. Related Vulnerabilities

Same product: 99AI
Same vendor: vastxie
Same weakness: CWE-639

V. Comments for CVE-2026-111707

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