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CVE-2026-13489— 78 xiaozhi-esp32 MCP Response mcp_server.cc ParseMessage improper synchronization

Quick assessment

Affected
78 xiaozhi-esp32
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.

Xiaoxia An MCP-based Chatbot是Xiaoxia个人开发者的一个基于MCP的聊天机器人软件。 Xiaoxia An MCP-based Chatbot 2.2.0版本、2.2.1版本、2.2.2版本、2.2.3版本、2.2.4版本、2.2.5版本和2.2.6版本存在竞争条件问题漏洞，该漏洞源于文件main/mcp_server.cc的ParseMessage函数中存在MCP Response Handler组件的同步不当问题，可能导致远程攻击。

CVSS 3.1 · Low EPSS 0.35% · P26

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 7

VendorProduct Version RangeStatus
78 xiaozhi-esp32 2.2.0 affected
2.2.1 affected
2.2.2 affected
2.2.3 affected
2.2.4 affected
2.2.5 affected
2.2.6 affected
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I. Basic Information for CVE-2026-13489

Vulnerability Information
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Vulnerability Title
78 xiaozhi-esp32 MCP Response mcp_server.cc ParseMessage improper synchronization
Source: CVE Program / CVE List V5
Vulnerability Description
A weakness has been identified in 78 xiaozhi-esp32 up to 2.2.6. Affected by this issue is the function ParseMessage of the file main/mcp_server.cc of the component MCP Response Handler. This manipulation causes improper synchronization. Remote exploitation of the attack is possible. The attack's complexity is rated as high. The exploitation is known to be difficult. The exploit has been made available to the public and could be used for attacks. The pull request to fix this issue awaits acceptance.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的同步机制
Source: CVE Program / CVE List V5
Vulnerability Title
Xiaoxia An MCP-based Chatbot 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Xiaoxia An MCP-based Chatbot是Xiaoxia个人开发者的一个基于MCP的聊天机器人软件。 Xiaoxia An MCP-based Chatbot 2.2.0版本、2.2.1版本、2.2.2版本、2.2.3版本、2.2.4版本、2.2.5版本和2.2.6版本存在竞争条件问题漏洞，该漏洞源于文件main/mcp_server.cc的ParseMessage函数中存在MCP Response Handler组件的同步不当问题，可能导致远程攻击。
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
78 xiaozhi-esp32 2.2.0 cpe:2.3:a:78:xiaozhi-esp32:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-13489

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III. Intelligence Information for CVE-2026-13489

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Patches & Fixes for CVE-2026-13489 (1)

Vendor Advisories for CVE-2026-13489 (1)

Other References for CVE-2026-13489 (1)

IV. Related Vulnerabilities

Same product: xiaozhi-esp32
Same vendor: 78
Same weakness: CWE-662

V. Comments for CVE-2026-13489

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