CVE-2026-13491CWE-404

78 xiaozhi-esp32 MQTT Goodbye mqtt_protocol.cc GetInstance denial of service

Medium · published June 28, 2026

CVSS v4.0
6.3
EPSS
1%
Percentile
49.2
In the wild
Unconfirmed
What it is

A vulnerability was detected in 78 xiaozhi-esp32 up to 2.2.6. This vulnerability affects the function Application::GetInstance of the file main/protocols/mqtt_protocol.cc of the component MQTT Goodbye Handler. Performing a manipulation of the argument session_id results in denial of service. The attack is possible to be carried out remotely. The complexity of an attack is rather high. It is stated that the exploitability is difficult. The exploit is now public and may be used. The patch is named e182471f8c5a22434346bd98da34d3b66c8c8b3e. It is recommended to apply a patch to fix this issue.

The record
Technical detail
CVSS v4.0
6.3 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
EPSS
0.00624 · 49.2th percentile
Weakness
CWE-404 · Improper Resource Shutdown or Release
Published
2026-06-28T11:15Z
EPSS history
Timeline
  • 28 JUN 11:15Z
    78 xiaozhi-esp32 MQTT Goodbye mqtt_protocol.cc GetInstance denial of service
    cvelistv5