Denial of Service Vulnerability in Open5GS SGWC Component
CVE-2026-1522

6.9MEDIUM

Key Information:

Vendor

Open5GS

Status
Open5gs
Vendor
CVE Published:
28 January 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-1522?

A vulnerability has been identified in Open5GS, where an issue in the SGWC component can lead to denial of service. Specifically, the problem exists in the function sgwc_s5c_handle_modify_bearer_response located in the source file src/sgwc/s5c-handler.c. This vulnerability can be exploited remotely, potentially allowing an attacker to disrupt services. A patch has been made available (b19cf6a) to resolve this issue, and it is strongly recommended to apply it as soon as possible to ensure system security.

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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-2026-1522 - Proof of Concept

References

https://vuldb.com/?id.343193
vdb-entrytechnical-description
https://vuldb.com/?ctiid.343193
signaturepermissions-required
https://vuldb.com/?submit.738371
third-party-advisory

CVSS V4

Score:
6.9
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

FrankyLin (VulDB User)
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