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CVE-2026-30856— WeKnora: Tool Execution Hijacking via Ambigous Naming Convention In MCP client and Indirect Prompt Injection

Quick assessment

Affected
Tencent WeKnora
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

WeKnora是Tencent开源的一个基于LLM的框架，具有使用RAG范式进行深度文档理解、语义检索和上下文感知答案等功能。 WeKnora 0.3.0之前版本存在安全漏洞，该漏洞源于工具名称冲突和间接提示注入，可能导致恶意工具劫持执行流程。

CVSS 5.9 · Medium EPSS 0.29% · P20
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I. Basic Information for CVE-2026-30856

Vulnerability Information
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Vulnerability Title
WeKnora: Tool Execution Hijacking via Ambigous Naming Convention In MCP client and Indirect Prompt Injection
Source: CVE Program / CVE List V5
Vulnerability Description
WeKnora is an LLM-powered framework designed for deep document understanding and semantic retrieval. Prior to version 0.3.0, a vulnerability involving tool name collision and indirect prompt injection allows a malicious remote MCP server to hijack tool execution. By exploiting an ambiguous naming convention in the MCP client (mcp_{service}_{tool}), an attacker can register a malicious tool that overwrites a legitimate one (e.g., tavily_extract). This enables the attacker to redirect LLM execution flow, exfiltrate system prompts, context, and potentially execute other tools with the user's privileges. This issue has been patched in version 0.3.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
使用不正确的解析名称或索引
Source: CVE Program / CVE List V5
Vulnerability Title
WeKnora 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
WeKnora是Tencent开源的一个基于LLM的框架，具有使用RAG范式进行深度文档理解、语义检索和上下文感知答案等功能。 WeKnora 0.3.0之前版本存在安全漏洞，该漏洞源于工具名称冲突和间接提示注入，可能导致恶意工具劫持执行流程。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Tencent WeKnora < 0.3.0 -

II. Public POCs for CVE-2026-30856

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III. Intelligence Information for CVE-2026-30856

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Vendor Advisories for CVE-2026-30856 (1)

Same Patch Batch · Tencent · 2026-03-07 · 8 CVEs total

CVE-2026-30861 10.0 CRITICAL WeKnora: Remote Code Execution (RCE) via Command Injection in MCP Stdio Configuration Vali
CVE-2026-30860 10.0 CRITICAL WeKnora: Remote Code Execution via SQL Injection Bypass in AI Database Query Tool
CVE-2026-30855 8.8 HIGH WeKnora: Broken Access Control in Tenant Management
CVE-2026-30858 6.5 MEDIUM WeKnora: DNS Rebinding Vulnerability in web_fetch Tool Allows SSRF to Internal Resources
CVE-2026-30247 5.9 MEDIUM WeKnora: SSRF via Redirection
CVE-2026-30859 5.3 MEDIUM WeKnora: Broken Access Control - Cross-Tenant Data Exposure
CVE-2026-30857 5.3 MEDIUM WeKnora: Unauthorized Cross‑Tenant Knowledge Base Cloning

IV. Related Vulnerabilities

Same product: WeKnora
Same vendor: Tencent
Same weakness: CWE-706

V. Comments for CVE-2026-30856

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