CVE-2026-13489 78 xiaozhi-esp32 MCP Response mcp_server.cc ParseMessage improper synchronization
Improper synchronization in the MCP Response Handler allows remote attackers to exploit race conditions, potentially causing undefined behavior or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-13489?
CVE-2026-13489 is a low-severity vulnerability in 78 xiaozhi-esp32, published on 28 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-662
Which versions are affected by CVE-2026-13489?
How do I fix CVE-2026-13489?
No fix has been published for CVE-2026-13489 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-13489 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-13489 exists.
Sources
Also known as GHSA-2vm4-w283-mr2p.