Denial of Service Vulnerability in Open5GS NRF Component
CVE-2026-8729

5.3MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
17 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8729?

A vulnerability has been identified in the Open5GS software, specifically within the NRF component's library function /lib/sbi/message.c. The flaw arises due to improper handling of the argument service-names/snssais, which can be manipulated to cause a denial of service. This vulnerability can be exploited remotely, potentially allowing attackers to disrupt service availability. Although the issue was reported to the Open5GS team early on, there has been no response to mitigate or address the vulnerability. Exploitation details have become public, making it crucial for users of affected versions to take precautions.

Affected Version(s)

Open5GS 2.7.0

Open5GS 2.7.1

Open5GS 2.7.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-8729 - Proof of Concept

References

https://vuldb.com/vuln/364318
vdb-entrytechnical-description
https://vuldb.com/vuln/364318/cti
signaturepermissions-required
https://vuldb.com/submit/808512
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LinJu (VulDB User)
VulDB CNA Team
.