CVE-2026-4524 — GitLab CE/EE Affecting All Versions From 18.9.1 Before 18.9. Vulnerability

title: GitLab Unauthenticated Access to Confidential Issues - CVE-2026-4524
id: scw-2026-05-14-ai-1
status: experimental
level: high
description: |
  Detects attempts by an authenticated user to access confidential issue content in public projects by targeting specific GitLab API endpoints. This rule specifically looks for GET requests to '/issues' with a 'confidential=true' query parameter, which is indicative of the vulnerability described in CVE-2026-4524.
author: SCW Feed Engine (AI-generated)
date: 2026-05-14
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-4524/
tags:
  - attack.privilege_escalation
  - attack.t1068
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/issues'
      cs-method|exact:
          - 'GET'
      sc-status|exact:
          - '200'
  selection_base:
      cs-uri-query|contains:
          - 'confidential=true'
  condition: selection AND selection_base
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse