CVE-2026-8743
Open5GS AMF/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorization
- State
- Published
- Severity
- 5.3 Medium
- Published
- May 17, 2026
- Updated
- Oct 21, 2026
- Reserved
- May 16, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P | VulDB |
| 3.1 | 6.3 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C | VulDB |
| 3.0 | 6.3 Medium | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:C | VulDB |
| 2.0 | 6.5 Medium | AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:OF/RC:C | VulDB |
Weaknesses
Affected Products
| Product | Versions |
|---|---|
Open5GSn/a |
|
References
- VDB-364330 | Open5GS AMF/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorizationvdb-entrytechnical-description
- VDB-364330 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
- CVE-2026-8743 | CVE Analysis and Reportthird-party-advisory
- Submit #814559 | Open5GS 2.7.6 Incorrect Authorizationthird-party-advisory
- https://github.com/open5gs/open5gs/issues/4498exploitissue-tracking
- https://github.com/open5gs/open5gs/pull/4553issue-trackingpatch
- https://github.com/open5gs/open5gs/commit/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1patch
- https://github.com/open5gs/open5gs/product
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