CVE-2026-2311 — Privilege Escalation

title: IBM i Web Admin GUI Privilege Escalation Attempt — CVE-2026-2311
id: scw-2026-04-30-ai-1
status: experimental
level: critical
description: |
  Detects attempts to exploit CVE-2026-2311 by targeting the IBM i Web Administration GUI with a specific POST request that bypasses authorization checks, potentially leading to privilege escalation. This rule looks for the '/ibm/console/logon' URI with a 'POST' method and a suspicious query parameter indicating an attempted exploit.
author: SCW Feed Engine (AI-generated)
date: 2026-04-30
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-2311/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/ibm/console/logon'
      cs-method:
          - 'POST'
      sc-status:
          - '200'
      cs-uri-query|contains:
          - 'invalid_auth_check'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse