CVE-2026-8786 — Tencent WeKnora Vulnerability

title: CVE-2026-8786 - Tencent WeKnora Authorization Bypass via Config API
id: scw-2026-05-18-ai-1
status: experimental
level: high
description: |
  Detects attempts to exploit CVE-2026-8786 by targeting the Config API endpoint for initialization. The vulnerability lies in the `getKnowledgeBaseForInitialization` function where manipulation of the `kbId` parameter can lead to an authorization bypass. This rule specifically looks for POST requests to the initialization API endpoint containing the vulnerable function and the `kbId` parameter, indicating a potential exploit attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-05-18
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8786/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/api/v1/initialization'
      cs-uri-query|contains:
          - 'getKnowledgeBaseForInitialization'
      cs-uri-query|contains:
          - 'kbId='
      cs-method: 'POST'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse