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CVE-2026-30859— WeKnora: Broken Access Control - Cross-Tenant Data Exposure

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 0.2.12之前版本存在访问控制错误漏洞，该漏洞源于数据库查询工具存在访问控制缺陷，可能导致跨租户读取敏感数据。

CVSS 5.3 · Medium EPSS 0.36% · P27

Possible ATT&CK Techniques 2 AI

T1530 · Data from Cloud Storage T1530.001
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I. Basic Information for CVE-2026-30859

Vulnerability Information
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Vulnerability Title
WeKnora: Broken Access Control - Cross-Tenant Data Exposure
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 0.2.12, a broken access control vulnerability in the database query tool allows any authenticated tenant to read sensitive data belonging to other tenants, including API keys, model configurations, and private messages. The application fails to enforce tenant isolation on critical tables (models, messages, embeddings), enabling unauthorized cross-tenant data access with user-level authentication privileges. This issue has been patched in version 0.2.12.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
WeKnora 访问控制错误漏洞
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 0.2.12之前版本存在访问控制错误漏洞，该漏洞源于数据库查询工具存在访问控制缺陷，可能导致跨租户读取敏感数据。
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 < 0.2.12 -

II. Public POCs for CVE-2026-30859

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III. Intelligence Information for CVE-2026-30859

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Vendor Advisories for CVE-2026-30859 (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-2026-30856 5.9 MEDIUM WeKnora: Tool Execution Hijacking via Ambigous Naming Convention In MCP client and Indirec
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-284

V. Comments for CVE-2026-30859

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