CVE-2026-8187 — Open5GS Vulnerability

title: CVE-2026-8187 - Open5GS UPF Resource Consumption Attempt
id: scw-2026-05-09-ai-1
status: experimental
level: high
description: |
  Detects attempts to exploit CVE-2026-8187 by targeting the _gtpv1_u_recv_cb function in Open5GS UPF. This rule looks for specific URI patterns and HTTP methods commonly associated with GTP-U traffic, which is where the vulnerability resides. Exploitation can lead to resource consumption.
author: SCW Feed Engine (AI-generated)
date: 2026-05-09
references:
  - https://shimiscyberworld.com/posts/nvd-CVE-2026-8187/
tags:
  - attack.initial_access
  - attack.t1190
logsource:
    category: webserver
detection:
  selection:
      cs-uri|contains:
          - '/gtpv1/u/recv'
      cs-method:
          - 'POST'
      cs-uri-query|contains:
          - 'message_type=1'
      condition: cs-uri AND cs-method AND cs-uri-query
falsepositives:
  - Legitimate administrative activity

Source: Shimi's Cyber World · License & reuse