CVE-2026-8728 — Open5GS Denial of Service
CVE-2026-8728 — A security vulnerability has been detected in Open5GS up to 2.7.7. The impacted element is the function ogs_sbi_discovery_option_parse_plmn_list in the library /lib/sbi/conv.c of the component NRF. Such manipulation of the argument target-plmn-list leads to denial of service. The att
What This Means For You
- If your environment is affected by CWE-404, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-8728 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
1 rule · 6 SIEM formats1 detection rule auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-8728 - Open5GS NRF Denial of Service via target-plmn-list
title: CVE-2026-8728 - Open5GS NRF Denial of Service via target-plmn-list
id: scw-2026-05-17-ai-1
status: experimental
level: high
description: |
Detects attempts to exploit CVE-2026-8728 by sending a request to the Open5GS NRF component with a manipulated 'target-plmn-list' parameter, leading to a denial of service. This rule specifically looks for the presence of 'target-plmn-list=' in the query string and a '500' status code, indicative of a server-side error caused by the exploit.
author: SCW Feed Engine (AI-generated)
date: 2026-05-17
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-8728/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri-query|contains:
- 'target-plmn-list='
cs-method:
- 'GET'
sc-status:
- '500'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-8728 | vulnerability | CVE-2026-8728 |
| CWE-404 | weakness | CWE-404 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 17, 2026 at 07:16 UTC |
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