CVE-2026-42396 — Insufficient Validation of Member Zone Data May Cause

title: CVE-2026-42396 - Catalog Zone Transfer Failure Due to Insufficient Validation
id: scw-2026-05-21-ai-1
status: experimental
level: medium
description: |
  This rule detects attempts to exploit CVE-2026-42396 by targeting the catalog zone transfer endpoint with a POST request that results in a server error (500). This indicates the application failed to properly validate member zone data, potentially leading to a denial of service or other unintended consequences as described in the CVE.
author: SCW Feed Engine (AI-generated)
date: 2026-05-21
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-42396/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/catalog/zones'
      cs-method:
          - 'POST'
      sc-status:
          - '500'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse