Denial of Service Vulnerability in Open5GS SMF by Open5GS
CVE-2026-8249

5.3MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
10 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8249?

A vulnerability in Open5GS SMF impacting version 2.7.7 allows unauthorized manipulation of the function update_authorized_pcc_rule_and_qos within the source file /src/smf/npcf-handler.c. This results in a Denial of Service (DoS) condition, permitting remote exploitation. Despite being reported to the project, the issue remains unaddressed, leaving users vulnerable to potential attacks. Immediate action is recommended to mitigate risks associated with this exploit.

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-2026-8249 - Proof of Concept

References

https://vuldb.com/vuln/362546
vdb-entrytechnical-description
https://vuldb.com/vuln/362546/cti
signaturepermissions-required
https://vuldb.com/submit/808473
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
.