Tencent WeKnora 0.1.0/0.2.5 MCP Stdio Configuration command injection

Summaryinfo

A vulnerability, which was classified as critical, has been found in Tencent WeKnora. This affects an unknown part of the component MCP Stdio Configuration Handler. The manipulation leads to command injection. This vulnerability is uniquely identified as CVE-2026-30861. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Tencent WeKnora and classified as critical. This issue affects an unknown functionality of the component MCP Stdio Configuration Handler. The manipulation with an unknown input leads to a command injection vulnerability. Using CWE to declare the problem leads to CWE-77. The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. From version 0.2.5 to before version 0.2.10, an unauthenticated remote code execution (RCE) vulnerability exists in the MCP stdio configuration validation. The application allows unrestricted user registration, meaning any attacker can create an account and exploit the command injection flaw. Despite implementing a whitelist for allowed commands (npx, uvx) and blacklists for dangerous arguments and environment variables, the validation can be bypassed using the -p flag with npx node. This allows any attacker to execute arbitrary commands with the application's privileges, leading to complete system compromise. This issue has been patched in version 0.2.10.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-30861. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1202 for this issue.

Upgrading to version 0.2.10 eliminates this vulnerability.

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Productinfo

Vendor

• Tencent

Name

• WeKnora

Version

• 0.1.0
• 0.2.5

CPE 2.3info

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CPE 2.2info

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• 🔒

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