CVE-2026-8731: Denial of Service in Open5GS
A vulnerability has been found in Open5GS up to 2.7.7. Affected is the function ogs_sbi_client_add in the library /lib/sbi/client.c of the component NRF. The manipulation of the argument client_pool leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
AI Analysis
Technical Summary
This vulnerability in Open5GS (up to version 2.7.7) involves the ogs_sbi_client_add function within the NRF component's client.c library. An attacker can remotely manipulate the client_pool argument, leading to a denial of service condition. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with network attack vector, low attack complexity, no privileges required, and no user interaction needed. The project has been informed but has not yet responded or released a fix.
Potential Impact
Successful exploitation results in denial of service, potentially disrupting the availability of the Open5GS network function repository (NRF) component. This could impact the operation of 5G core network services relying on Open5GS. There is no indication of privilege escalation, data confidentiality, or integrity impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the project has not responded or released a fix, users should monitor official Open5GS channels for updates. Until a patch is available, consider limiting network exposure of the affected component and applying network-level protections to reduce the risk of exploitation.
CVE-2026-8731: Denial of Service in Open5GS
Description
A vulnerability has been found in Open5GS up to 2.7.7. Affected is the function ogs_sbi_client_add in the library /lib/sbi/client.c of the component NRF. The manipulation of the argument client_pool leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
CVSS v4.0
Score 5.3medium
Affected software
pkg:github/open5gs/open5gsRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in Open5GS (up to version 2.7.7) involves the ogs_sbi_client_add function within the NRF component's client.c library. An attacker can remotely manipulate the client_pool argument, leading to a denial of service condition. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with network attack vector, low attack complexity, no privileges required, and no user interaction needed. The project has been informed but has not yet responded or released a fix.
Potential Impact
Successful exploitation results in denial of service, potentially disrupting the availability of the Open5GS network function repository (NRF) component. This could impact the operation of 5G core network services relying on Open5GS. There is no indication of privilege escalation, data confidentiality, or integrity impact.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since the project has not responded or released a fix, users should monitor official Open5GS channels for updates. Until a patch is available, consider limiting network exposure of the affected component and applying network-level protections to reduce the risk of exploitation.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-16T10:09:23.831Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a09495aec166c07b07f5c89
Added to database: 05/17/2026, 04:51:38 UTC
Last enriched: 05/24/2026, 06:29:27 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 109
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