CVE-2026-8743: Improper Authorization in Open5GS
A vulnerability was found in Open5GS up to 2.7.6. This impacts the function ran_ue_find_by_amf_ue_ngap_id of the file src/amf/context.c of the component AMF/MME. Performing a manipulation results in improper authorization. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The patch is named 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1. It is suggested to install a patch to address this issue.
AI Analysis
Technical Summary
Open5GS versions 2.7.0 through 2.7.6 contain an improper authorization vulnerability in the AMF/MME component, specifically in the ran_ue_find_by_amf_ue_ngap_id function of src/amf/context.c. This vulnerability allows remote attackers to manipulate the function leading to unauthorized actions. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with network attack vector, low complexity, no privileges required, and no user interaction needed. An exploit is publicly available. A patch commit 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1 has been identified to fix the issue.
Potential Impact
The vulnerability enables remote attackers to perform improper authorization in the affected Open5GS component, potentially allowing unauthorized access or actions within the AMF/MME functionality. The CVSS score of 5.3 reflects a medium impact with limited scope and low complexity exploitation. There are no confirmed exploits in the wild at this time.
Mitigation Recommendations
A patch identified by commit 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1 is available and it is recommended to apply this patch to affected Open5GS versions (up to 2.7.6) to remediate the vulnerability. Patch status beyond this commit is not explicitly confirmed in the vendor advisory, so users should verify the latest vendor guidance and apply official fixes accordingly.
CVE-2026-8743: Improper Authorization in Open5GS
Description
A vulnerability was found in Open5GS up to 2.7.6. This impacts the function ran_ue_find_by_amf_ue_ngap_id of the file src/amf/context.c of the component AMF/MME. Performing a manipulation results in improper authorization. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The patch is named 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1. It is suggested to install a patch to address this issue.
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
Open5GS versions 2.7.0 through 2.7.6 contain an improper authorization vulnerability in the AMF/MME component, specifically in the ran_ue_find_by_amf_ue_ngap_id function of src/amf/context.c. This vulnerability allows remote attackers to manipulate the function leading to unauthorized actions. The vulnerability has a CVSS 4.0 base score of 5.3, indicating medium severity, with network attack vector, low complexity, no privileges required, and no user interaction needed. An exploit is publicly available. A patch commit 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1 has been identified to fix the issue.
Potential Impact
The vulnerability enables remote attackers to perform improper authorization in the affected Open5GS component, potentially allowing unauthorized access or actions within the AMF/MME functionality. The CVSS score of 5.3 reflects a medium impact with limited scope and low complexity exploitation. There are no confirmed exploits in the wild at this time.
Mitigation Recommendations
A patch identified by commit 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1 is available and it is recommended to apply this patch to affected Open5GS versions (up to 2.7.6) to remediate the vulnerability. Patch status beyond this commit is not explicitly confirmed in the vendor advisory, so users should verify the latest vendor guidance and apply official fixes accordingly.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulDB
- Date Reserved
- 2026-05-16T12:38:24.093Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a098c27ec166c07b0b40a97
Added to database: 05/17/2026, 09:36:39 UTC
Last enriched: 05/24/2026, 19:16:11 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 96
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