CVE-2026-13489Public exploitNetwork attack vector

MCP response disclosure via cross-client WebSocket broadcast

Published Jun 28, 2026 · Updated Jun 28, 2026

Information disclosure in Xiaoxia xiaozhi-esp32 2.2.0 through 2.2.6 allows remote authenticated users to read MCP responses. The Otto Robot WebSocket handler drops the originating connection before ParseMessage correlates replies only by JSON-RPC ID, then BroadcastMessage sends each result to every connected client. Exploitation requires access to the device's local port 8080 WebSocket endpoint and an Otto Robot firmware build; exposed tool results can contain device, camera, or sensor data.

CVSS severity3.1
Low
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Information disclosure in Xiaoxia xiaozhi-esp32 2.2.0 through 2.2.6 allows remote authenticated users to read MCP responses. The Otto Robot WebSocket handler drops the originating connection before ParseMessage correlates replies only by JSON-RPC ID, then BroadcastMessage sends each result to every connected client. Exploitation requires access to the device's local port 8080 WebSocket endpoint and an Otto Robot firmware build; exposed tool results can contain device, camera, or sensor data.

The record

CVE
CVE-2026-13489
Published
Jun 28, 2026
Updated
Jun 28, 2026
Vendor
Xiaoxia
Product
xiaozhi-esp32
Classifications
CWE-662, T1210
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 28, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.2.0
  2. Affected versionversion=2.2.1
  3. Affected versionversion=2.2.2
  4. Affected versionversion=2.2.3
  5. Affected versionversion=2.2.4
  6. Affected versionversion=2.2.5
  7. Affected versionversion=2.2.6

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Xiaoxia · xiaozhi-esp32version=2.2.0; version=2.2.1; version=2.2.2; version=2.2.3; version=2.2.4; version=2.2.5; version=2.2.6

Published CVSS scores

3.1VulDBCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:N
1.3VulDBCVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P
2.1VulDBAV:N/AC:H/Au:S/C:N/I:P/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-662Improper Synchronization
T1210Exploitation of Remote Services

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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