CVE-2026-8250 — Open5GS Denial of Service

title: CVE-2026-8250 - Open5GS SMF N4 QoS Flow Modification DoS
id: scw-2026-05-10-ai-1
status: experimental
level: high
description: |
  Detects attempts to exploit CVE-2026-8250 by targeting the smf_n4_build_qos_flow_to_modify_list function in Open5GS SMF. This rule looks for specific URI paths and HTTP methods commonly associated with the exploitation of this denial-of-service vulnerability.
author: SCW Feed Engine (AI-generated)
date: 2026-05-10
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8250/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/smf_n4_build_qos_flow_to_modify_list'
      cs-method:
          - 'POST'
      condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse