CVE-2026-8743
Open5GS AMF/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorization
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.
INFO
Published Date :
May 17, 2026, 10:16 a.m.
Last Modified :
May 19, 2026, 1:35 a.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 2.0 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 4.0 | LOW | [email protected] |
Solution
- Install the patch 5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1.
- Update Open5GS to a patched version.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-8743.
| URL | Resource |
|---|---|
| https://github.com/open5gs/open5gs/ | Product |
| https://github.com/open5gs/open5gs/commit/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1 | Patch |
| https://github.com/open5gs/open5gs/issues/4498 | Exploit Issue Tracking |
| https://github.com/open5gs/open5gs/pull/4553 | Issue Tracking Patch |
| https://vuldb.com/submit/814559 | Third Party Advisory VDB Entry |
| https://vuldb.com/vuln/364330 | Third Party Advisory VDB Entry |
| https://vuldb.com/vuln/364330/cti | Permissions Required VDB Entry |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-8743 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-8743
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-8743 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-8743 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
May. 19, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:* versions up to (including) 2.7.6 Added Reference Type VulDB: https://github.com/open5gs/open5gs/ Types: Product Added Reference Type VulDB: https://github.com/open5gs/open5gs/commit/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1 Types: Patch Added Reference Type VulDB: https://github.com/open5gs/open5gs/issues/4498 Types: Exploit, Issue Tracking Added Reference Type VulDB: https://github.com/open5gs/open5gs/pull/4553 Types: Issue Tracking, Patch Added Reference Type VulDB: https://vuldb.com/submit/814559 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/vuln/364330 Types: Third Party Advisory, VDB Entry Added Reference Type VulDB: https://vuldb.com/vuln/364330/cti Types: Permissions Required, VDB Entry -
New CVE Received by [email protected]
May. 17, 2026
Action Type Old Value New Value Added 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. Added CVSS V4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L Added CVSS V2 (AV:N/AC:L/Au:S/C:P/I:P/A:P) Added CWE CWE-285 Added CWE CWE-266 Added Reference https://github.com/open5gs/open5gs/ Added Reference https://github.com/open5gs/open5gs/commit/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1 Added Reference https://github.com/open5gs/open5gs/issues/4498 Added Reference https://github.com/open5gs/open5gs/pull/4553 Added Reference https://vuldb.com/submit/814559 Added Reference https://vuldb.com/vuln/364330 Added Reference https://vuldb.com/vuln/364330/cti