CVE-2026-8186 — Open5GS Out-of-Bounds $1

title: CVE-2026-8186 - Open5GS Out-of-Bounds Read via SBI Client
id: scw-2026-05-09-ai-1
status: experimental
level: high
description: |
  Detects attempts to exploit CVE-2026-8186 by targeting the specific function ogs_sbi_client_send_via_scp_or_sepp within the Open5GS NF component. This rule looks for HTTP POST requests containing a URI that directly references this vulnerable function, indicating a potential remote out-of-bounds read attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-05-09
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8186/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/ogs_sbi_client_send_via_scp_or_sepp'
      cs-method:
          - 'POST'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse