CVE-2026-22688Public exploitNetwork attack vector

Authenticated command execution via unvalidated MCP stdio

Published Jan 10, 2026 · Updated Jan 10, 2026

Command injection in Tencent WeKnora before 0.2.5 allows remote authenticated users to execute arbitrary commands through MCP stdio settings. The MCP service create and test flow stores unvalidated stdio_config.command and args, then passes them to NewStdioMCPClientWithOptions to start a subprocess. Any bearer-authenticated user can reach the API, and commands run with the server process's privileges.

CVSS severity9.9
Critical
EPSS probability1.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Command injection in Tencent WeKnora before 0.2.5 allows remote authenticated users to execute arbitrary commands through MCP stdio settings. The MCP service create and test flow stores unvalidated stdio_config.command and args, then passes them to NewStdioMCPClientWithOptions to start a subprocess. Any bearer-authenticated user can reach the API, and commands run with the server process's privileges.

The record

CVE
CVE-2026-22688
Published
Jan 10, 2026
Updated
Jan 10, 2026
Vendor
Tencent
Product
WeKnora
Classifications
CWE-77, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Jan 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

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

  1. Affected versionversion=< 0.2.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Tencent · WeKnoraversion=< 0.2.5

Published CVSS scores

9.9GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
8.8NIST National Vulnerability DatabaseCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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-77Improper Neutralization of Special Elements used in a Command ('Command Injection')
T1059Command and Scripting Interpreter

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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