CVE-2026-8270 — Denial of Service

title: CVE-2026-8270 Open5GS SMF DoS via Malformed QoS Rules
id: scw-2026-05-11-ai-1
status: experimental
level: high
description: |
  This rule detects attempts to exploit CVE-2026-8270 by sending a crafted request to the SMF component of Open5GS. The vulnerability lies in the 'ogs_nas_parse_qos_rules' function, and this rule specifically looks for requests targeting the QoS rules endpoint with a method likely to trigger the parsing logic, indicating a potential DoS attempt.
author: SCW Feed Engine (AI-generated)
date: 2026-05-11
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8270/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/smf/v1/qos_rules'
      cs-method|exact:
          - 'POST'
      cs-uri-query|contains:
          - 'ogs_nas_parse_qos_rules'
  condition: selection
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse