Denial of Service Vulnerability in Open5GS SMF Component
CVE-2026-8248

5.3MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
10 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8248?

A vulnerability in Open5GS, specifically within the SMF component, has been identified that could lead to a denial of service. The issue lies within the function update_authorized_pcc_rule_and_qos in the npcf-handler.c file. This flaw, present in versions up to 2.7.7, can be exploited remotely, potentially disrupting network operations. The relevant parties have been notified of the issue, but a response or patch has not yet been issued, leaving users at risk of an attack.

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-2026-8248 - Proof of Concept

References

https://vuldb.com/vuln/362545
vdb-entrytechnical-description
https://vuldb.com/vuln/362545/cti
signaturepermissions-required
https://vuldb.com/submit/808472
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
.