CVE-2026-13489
78 xiaozhi-esp32 MCP Response mcp_server.cc ParseMessage improper synchronization
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.
INFO
Published Date :
June 28, 2026, 12:17 p.m.
Last Modified :
June 29, 2026, 6:43 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 2.0 | LOW | [email protected] | ||||
| CVSS 3.1 | LOW | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Update the MCP Response Handler component to the latest version.
- Apply the provided pull request to fix the synchronization issue.
- Review and test the updated ParseMessage function implementation.
Public PoC/Exploit Available at Github
CVE-2026-13489 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-13489.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-13489 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-13489
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
The Project shares all information on MCP related CVE's published
mcp mcp-security mcp-cve
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-13489 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-13489 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jun. 29, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-13489', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'poc'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-06-29T13:00:53.902441Z'} -
New CVE Received by [email protected]
Jun. 28, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:a:78:xiaozhi-esp32:*:*:*:*:*:*:*:*'], 'vendor': '78', 'modules': ['MCP Response Handler'], 'product': 'xiaozhi-esp32', 'versions': [{'status': 'affected', 'version': '2.2.0'}, {'status': 'affected', 'version': '2.2.1'}, {'status': 'affected', 'version': '2.2.2'}, {'status': 'affected', 'version': '2.2.3'}, {'status': 'affected', 'version': '2.2.4'}, {'status': 'affected', 'version': '2.2.5'}, {'status': 'affected', 'version': '2.2.6'}]}] Added 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. Added CVSS V4.0 AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N Added CVSS V2 (AV:N/AC:H/Au:S/C:N/I:P/A:N) Added CWE CWE-662 Added Reference https://github.com/78/xiaozhi-esp32/ Added Reference https://github.com/78/xiaozhi-esp32/issues/2020 Added Reference https://github.com/78/xiaozhi-esp32/pull/2021 Added Reference https://vuldb.com/cve/CVE-2026-13489 Added Reference https://vuldb.com/submit/838198 Added Reference https://vuldb.com/vuln/374486 Added Reference https://vuldb.com/vuln/374486/cti