CVE-2026-7779: Denial of Service in Open5GS
A denial of service vulnerability exists in Open5GS versions up to 2. 7. 7 in the function udm_nudr_dr_handle_subscription_authentication within the authentication-subscription endpoint. This flaw allows remote attackers to cause a denial of service via crafted input. The vulnerability has a medium severity rating with a CVSS 4. 0 score of 5. 3. Although the issue was reported early to the project, no official response or patch has been provided yet. Exploit code has been publicly released, increasing the risk of attack. No known exploits in the wild have been confirmed at this time.
AI Analysis
Technical Summary
CVE-2026-7779 is a medium severity denial of service vulnerability affecting Open5GS up to version 2.7.7. The flaw resides in the function udm_nudr_dr_handle_subscription_authentication in the /src/udm/nudr-handler.c file, part of the authentication-subscription endpoint. Remote attackers can manipulate inputs to trigger a denial of service condition. The vulnerability was responsibly disclosed but remains unpatched as of the latest information. Public exploit code is available, but no active exploitation has been reported.
Potential Impact
Successful exploitation results in a denial of service condition in Open5GS, potentially disrupting authentication subscription services. This could affect availability of the affected component but does not indicate privilege escalation or data confidentiality impact. The medium CVSS score reflects the network attack vector with low complexity and no user interaction required.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation has been published by the Open5GS project, users should monitor vendor channels for updates. Until a patch is available, consider limiting exposure of the affected service to untrusted networks to reduce risk.
CVE-2026-7779: Denial of Service in Open5GS
Description
A denial of service vulnerability exists in Open5GS versions up to 2. 7. 7 in the function udm_nudr_dr_handle_subscription_authentication within the authentication-subscription endpoint. This flaw allows remote attackers to cause a denial of service via crafted input. The vulnerability has a medium severity rating with a CVSS 4. 0 score of 5. 3. Although the issue was reported early to the project, no official response or patch has been provided yet. Exploit code has been publicly released, increasing the risk of attack. No known exploits in the wild have been confirmed at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-7779 is a medium severity denial of service vulnerability affecting Open5GS up to version 2.7.7. The flaw resides in the function udm_nudr_dr_handle_subscription_authentication in the /src/udm/nudr-handler.c file, part of the authentication-subscription endpoint. Remote attackers can manipulate inputs to trigger a denial of service condition. The vulnerability was responsibly disclosed but remains unpatched as of the latest information. Public exploit code is available, but no active exploitation has been reported.
Potential Impact
Successful exploitation results in a denial of service condition in Open5GS, potentially disrupting authentication subscription services. This could affect availability of the affected component but does not indicate privilege escalation or data confidentiality impact. The medium CVSS score reflects the network attack vector with low complexity and no user interaction required.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or temporary mitigation has been published by the Open5GS project, users should monitor vendor channels for updates. Until a patch is available, consider limiting exposure of the affected service to untrusted networks to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-04T15:50:14.414Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 69f90a5bcbff5d86104a42a9
Added to database: 5/4/2026, 9:06:35 PM
Last enriched: 5/4/2026, 9:21:21 PM
Last updated: 5/4/2026, 10:08:32 PM
Views: 5
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