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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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:c48bfa5f4285afde11c951c9b5172e15273a11674a25fb0ffd10953253d7884b
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 4 assertions

{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"},"metric_type":"cvssV4_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/metrics/0/cvssV4_0

{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/metrics/3/cvssV2_0

{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/metrics/2/cvssV3_0

Affected products and versions

1 source assertion
{"cpes":["cpe:2.3:a:78:xiaozhi-esp32:*:*:*:*:*:*:*:*"],"modules":["MQTT Goodbye Handler"],"product":"xiaozhi-esp32","vendor":"78","versions":[{"status":"affected","version":"2.2.0"},{"status":"affected","version":"2.2.1"},{"status":"affected","version":"2.2.2"},{"status":"affected","version":"2.2.3"},{"status":"affected","version":"2.2.4"},{"status":"affected","version":"2.2.5"},{"status":"affected","version":"2.2.6"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/affected/0

Provider-owned CVSS observations

4 source assertions
{"metric":{"baseScore":6.3,"baseSeverity":"MEDIUM","vectorString":"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","version":"4.0"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/metrics/0/cvssV4_0
{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"baseScore":2.6,"vectorString":"AV:N/AC:H/Au:N/C:N/I:N/A:P/E:POC/RL:OF/RC:C","version":"2.0"},"metric_type":"cvssV2_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/metrics/3/cvssV2_0
{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C","version":"3.0"},"metric_type":"cvssV3_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/metrics/2/cvssV3_0

CWE assertions

1 source assertion
{"cweId":"CWE-404","description":"Denial of Service","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/problemTypes/0/descriptions/0

Source references

8 source assertions
{"tags":["product"],"url":"https://github.com/78/xiaozhi-esp32/"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/references/7
{"tags":["patch"],"url":"https://github.com/78/xiaozhi-esp32/commit/e182471f8c5a22434346bd98da34d3b66c8c8b3e"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/references/6
{"tags":["exploit","issue-tracking"],"url":"https://github.com/78/xiaozhi-esp32/issues/2022"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/references/4
{"tags":["issue-tracking","patch"],"url":"https://github.com/78/xiaozhi-esp32/pull/2023"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/references/5
{"name":"CVE-2026-13491 | CVE Analysis and Report","tags":["third-party-advisory"],"url":"https://vuldb.com/cve/CVE-2026-13491"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/references/2
{"name":"Submit #838439 | 78 xiaozhi-esp32 2aeecd4e014780ac15cfa4866906cca16267010d Denial of Service","tags":["third-party-advisory"],"url":"https://vuldb.com/submit/838439"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/references/3
{"name":"VDB-374488 | 78 xiaozhi-esp32 MQTT Goodbye mqtt_protocol.cc GetInstance denial of service","tags":["vdb-entry","technical-description"],"url":"https://vuldb.com/vuln/374488"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/references/0
{"name":"VDB-374488 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"],"url":"https://vuldb.com/vuln/374488/cti"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:60ac78f946bfd0222d1d78e75762b6e278d52586713e003f04df3f00053db85e · sha256:8de8c181d8ebeebd… · /containers/cna/references/1

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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