Denial of Service Vulnerability in Open5GS NSSF by Open5GS
CVE-2026-8123

5.3MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
8 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8123?

A vulnerability exists in Open5GS's NSSF component, specifically within the ogs_sbi_discovery_option_add_snssais function in the /lib/sbi/message.c file. This flaw enables attackers to execute a denial of service attack remotely, potentially disrupting the service for users. The issue has been publicly disclosed, and earlier notifications to the Open5GS project regarding this vulnerability have not yet yielded a response.

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-2026-8123 - Proof of Concept

References

https://vuldb.com/vuln/361910
vdb-entrytechnical-description
https://vuldb.com/vuln/361910/cti
signaturepermissions-required
https://vuldb.com/submit/808426
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

LinZiyu (VulDB User)
VulDB CNA Team
.