CVE-2026-3693— Shy2593666979 AgentChat User Endpoint user.py update_user_info resource injection
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I. Basic Information for CVE-2026-3693
Vulnerability Information
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Vulnerability Title
Shy2593666979 AgentChat User Endpoint user.py update_user_info resource injection
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in Shy2593666979 AgentChat up to 2.3.0. This issue affects the function get_user_info/update_user_info of the file /src/backend/agentchat/api/v1/user.py of the component User Endpoint. This manipulation of the argument user_id causes improper control of resource identifiers. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对资源描述符的控制不恰当(资源注入)
Source: CVE Program / CVE List V5
Vulnerability Title
AgentChat 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
AgentChat是Shy2593666979个人开发者的一个基于大语言模型的多智能体协作对话系统。 AgentChat 2.3.0及之前版本存在安全漏洞，该漏洞源于对组件User Endpoint的文件/src/backend/agentchat/api/v1/user.py中函数get_user_info/update_user_info的参数user_id的错误操作，可能导致资源标识符控制不当。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Shy2593666979 | AgentChat | 2.0 | - |
II. Public POCs for CVE-2026-3693
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7957 chars
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III. Intelligence Information for CVE-2026-3693
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Vendor Advisories for CVE-2026-3693 (3)
- Submit #765589: Shy2593666979 AgentChat <= v2.3.0 Authorization Bypassthird-party-advisory
- Submit #765590: Shy2593666979 AgentChat <= v2.3.0 Authorization Bypassthird-party-advisory
- CVE-2026-3693 Shy2593666979 AgentChat User Endpoint user.py update_user_info resource injectionvdb-entrytechnical-description
Proof of Concept for CVE-2026-3693 (1)
Other References for CVE-2026-3693 (1)
IV. Related Vulnerabilities
Same weakness: CWE-99
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V. Comments for CVE-2026-3693
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