CVE-2026-13491

LOW

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

Title source: cna
STIX 2.1

Description

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.

References (8)

Core 8
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-374488 | 78 xiaozhi-esp32 MQTT Goodbye mqtt_protocol.cc GetInstance denial of service
https://vuldb.com/vuln/374488
Signature, Permissions Required signature permissions-required
VDB-374488 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/vuln/374488/cti
Third Party Advisory third-party-advisory
CVE-2026-13491 | CVE Analysis and Report
https://vuldb.com/cve/CVE-2026-13491
Third Party Advisory third-party-advisory
Submit #838439 | 78 xiaozhi-esp32 2aeecd4e014780ac15cfa4866906cca16267010d Denial of Service
https://vuldb.com/submit/838439
Exploit exploit issue-tracking
https://github.com/78/xiaozhi-esp32/issues/2022

Scores

CVSS v3 3.7
EPSS 0.0041
EPSS Percentile 33.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-404
Status published
Products (7)
78/xiaozhi-esp32 2.2.0
78/xiaozhi-esp32 2.2.1
78/xiaozhi-esp32 2.2.2
78/xiaozhi-esp32 2.2.3
78/xiaozhi-esp32 2.2.4
78/xiaozhi-esp32 2.2.5
78/xiaozhi-esp32 2.2.6
Published Jun 28, 2026
Tracked Since Jun 28, 2026