Open5GS NRF Vulnerability in nghttp2-server.c Library
CVE-2026-8746

5.3MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
17 May 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-8746?

A security flaw has been identified in Open5GS versions up to 2.7.7, specifically affecting the 'discover_handler' function within the nghttp2-server.c library of the NRF component. This vulnerability allows an attacker to manipulate the application leading to a 'use after free' condition, which may be exploited remotely. Details of the exploit have been publicly released, and the Open5GS project has been notified but has yet to issue a response to this critical security concern.

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-2026-8746 - Proof of Concept

References

https://vuldb.com/vuln/364333
vdb-entrytechnical-description
https://vuldb.com/vuln/364333/cti
signaturepermissions-required
https://vuldb.com/submit/817032
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

ZiyuLin (VulDB User)
VulDB CNA Team
.