CVE-2026-8743 — Open5GS Vulnerability
CVE-2026-8743 — A vulnerability was found in Open5GS up to 2.7.6. This impacts the function ran_ue_find_by_amf_ue_ngap_id of the file src/amf/context.c of the component AMF/MME. Performing a manipulation results in improper authorization. It is possible to initiate the attack remotely. The exploit h
What This Means For You
- If your environment is affected by CWE-266, CWE-285, review your exposure and prioritize patching based on your environment. Monitor vendor advisories for CVE-2026-8743 updates and patches.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-8743 - Open5GS Improper Authorization via AMF/MME Context
title: CVE-2026-8743 - Open5GS Improper Authorization via AMF/MME Context
id: scw-2026-05-17-ai-1
status: experimental
level: high
description: |
Detects attempts to exploit CVE-2026-8743 by targeting the specific URI '/ran_ue_find_by_amf_ue_ngap_id' within the Open5GS AMF/MME component. This vulnerability allows for improper authorization when this function is manipulated, potentially granting unauthorized access.
author: SCW Feed Engine (AI-generated)
date: 2026-05-17
references:
- https://shimiscyberworld.com/posts/nvd-CVE-2026-8743/
tags:
- attack.initial_access
- attack.t1190
logsource:
category: webserver
detection:
selection:
cs-uri|contains:
- '/ran_ue_find_by_amf_ue_ngap_id'
cs-method:
- 'POST'
condition: selection
falsepositives:
- Legitimate administrative activity
Source: Shimi's Cyber World · License & reuse
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-8743 | vulnerability | CVE-2026-8743 |
| CWE-266 | weakness | CWE-266 |
| CWE-285 | weakness | CWE-285 |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | May 17, 2026 at 13:16 UTC |
This content was curated and summarized by Shimi's Cyber World for informational purposes. It is not copied or republished in full. All intellectual property rights remain with the original author and source.
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