CVE-2026-8743

Source
https://cve.org/CVERecord?id=CVE-2026-8743
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8743.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-8743
Published
2026-05-17T09:00:13.637Z
Modified
2026-07-16T00:38:21.186515Z
Severity
  • 2.1 (Low) CVSS_V4 - 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 CVSS Calculator
Summary
Open5GS AMF/MME context.c ran_ue_find_by_amf_ue_ngap_id improper authorization
Details

A vulnerability was found in Open5GS up to 2.7.6. This impacts the function ranuefindbyamfuengap_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.

Database specific
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/8xxx/CVE-2026-8743.json",
    "cwe_ids": [
        "CWE-266",
        "CWE-285"
    ],
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "2.7.3"
                },
                {
                    "last_affected": "2.7.3"
                },
                {
                    "introduced": "2.7.4"
                },
                {
                    "last_affected": "2.7.4"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ],
    "cna_assigner": "VulDB"
}
References

Affected packages

Git / github.com/open5gs/open5gs

Affected ranges

Type
GIT
Repo
https://github.com/open5gs/open5gs
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
Database specific
{
    "cpe": "cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "2.7.6"
        }
    ]
}

Affected versions

2.*
2.7.0
2.7.1
2.7.2
2.7.5
2.7.6

Database specific

vanir_signatures
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        "deprecated": false,
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        },
        "id": "CVE-2026-8743-0c9efc8c",
        "signature_type": "Line",
        "target": {
            "file": "src/amf/ngap-handler.c"
        }
    },
    {
        "source": "https://github.com/open5gs/open5gs/commit/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1",
        "deprecated": false,
        "signature_version": "v1",
        "digest": {
            "function_hash": "175710418995671954961980409386213060407",
            "length": 7075.0
        },
        "id": "CVE-2026-8743-175594be",
        "signature_type": "Function",
        "target": {
            "function": "s1ap_handle_uplink_nas_transport",
            "file": "src/mme/s1ap-handler.c"
        }
    },
    {
        "source": "https://github.com/open5gs/open5gs/commit/5746b8576cfceec18ed87eb7d8cf11b1fb4cd8b1",
        "deprecated": false,
        "signature_version": "v1",
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                "303148798063614341293880820545280720723",
                "323672089275050858352850454176725504099"
            ]
        },
        "id": "CVE-2026-8743-f592e297",
        "signature_type": "Line",
        "target": {
            "file": "src/mme/s1ap-handler.c"
        }
    }
]
vanir_signatures_modified
"2026-07-16T00:38:21Z"
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-8743.json"