Vulnerability in 78 Xiaozhi-Esp32
CVE-2026-13491
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.006 (48.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- 78 Xiaozhi-Esp32 — versions 2.2.0, 2.2.1, 2.2.2
Weakness classification (CWE)
References
- vuldb.com/vuln/374488 (technical-description, vdb-entry)
- vuldb.com/vuln/374488/cti (signature, permissions-required)
- vuldb.com/cve/CVE-2026-13491 (third-party-advisory)
- vuldb.com/submit/838439 (third-party-advisory)
- github.com/78/xiaozhi-esp32/issues/2022 (issue-tracking, exploit)
- github.com/78/xiaozhi-esp32/pull/2023 (issue-tracking, patch)
- github.com/78/xiaozhi-esp32/commit/e182471f8c5a22434346bd98da34d3b66c8c8b3e (patch)
- github.com/78/xiaozhi-esp32/ (product)
Frequently asked questions
- What is CVE-2026-13491?
- CVE-2026-13491 is a low-severity vulnerability in 78 Xiaozhi-Esp32, classified under Improper Resource Shutdown or Release. CVSS score: 3.7/10. Published 2026-06-28.
- How severe is CVE-2026-13491?
- Low severity. CVSS v3 base score is 3.7 out of 10.