Answer in brief
CVE-2026-13491 records a Low severity (CVSS 3.7) vulnerability in 78 xiaozhi-esp32 MQTT Goodbye mqtt_protocol.cc GetInstance denial of service. The current sources do not mark it as known exploited. The current feed maps 78/xiaozhi-esp32 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 3.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps 78/xiaozhi-esp32 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| 78/xiaozhi-esp32generic | 2.2.0 || 2.2.1 || 2.2.2 || 2.2.3 || 2.2.4 || 2.2.5 || 2.2.6 | Not reported |
Published upstream
Jun 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 28, 2026
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.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-13491 records a Low severity (CVSS 3.7) vulnerability in 78 xiaozhi-esp32 MQTT Goodbye mqtt_protocol.cc GetInstance denial of service. The current sources do not mark it as known exploited. The current feed maps 78/xiaozhi-esp32 (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 3.7. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps 78/xiaozhi-esp32 (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| 78/xiaozhi-esp32generic | 2.2.0 || 2.2.1 || 2.2.2 || 2.2.3 || 2.2.4 || 2.2.5 || 2.2.6 | Not reported |
Published upstream
Jun 28, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 29, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 28, 2026
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.
Quoted source text, attributed separately from HOL analysis.