CVE-2026-1521

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Source
https://cve.org/CVERecord?id=CVE-2026-1521
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1521.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-1521
Published
2026-01-28T14:32:10Z
Modified
2026-10-21T09:41:39Z
Severity
  • 5.5 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P CVSS Calculator
Summary
Open5GS SGWC s5c-handler.c denial of service
Details

A security flaw has been discovered in Open5GS up to 2.7.6. This affects the function sgwc_s5c_handle_bearer_resource_failure_indication of the file src/sgwc/s5c-handler.c of the component SGWC. Performing a manipulation results in denial of service. The attack can be initiated remotely. The exploit has been released to the public and may be used for attacks. The patch is named 69b53add90a9479d7960b822fc60601d659c328b. It is recommended to apply a patch to fix this issue.

Database specific 
{
    "cna_assigner":  "VulDB",
    "cwe_ids":  [
        "CWE-404"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1521.json",
    "unresolved_ranges":  [
        {
            "extracted_events":  [
                {
                    "range":  [
                        {
                            "introduced":  "2.7.3"
                        },
                        {
                            "last_affected":  "2.7.3"
                        },
                        {
                            "introduced":  "2.7.4"
                        },
                        {
                            "last_affected":  "2.7.4"
                        }
                    ],
                    "source":  "AFFECTED_FIELD",
                    "strategy":  "StandaloneSingleVersion"
                }
            ]
        }
    ]
}
References

Affected packages

Git / github.com/open5gs/open5gs

Affected ranges

Type
GIT
Repo
https://github.com/open5gs/open5gs
Events
Introduced
83e35bb2de7e67646fdba849580184422b10006a
Fixed
69b53add90a9479d7960b822fc60601d659c328b
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "2.7.0"
                },
                {
                    "last_affected":  "2.7.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "2.7.1"
                },
                {
                    "last_affected":  "2.7.1"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "2.7.2"
                },
                {
                    "last_affected":  "2.7.2"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "2.7.5"
                },
                {
                    "last_affected":  "2.7.5"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "introduced":  "2.7.6"
                },
                {
                    "last_affected":  "2.7.6"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandaloneSingleVersion"
        },
        {
            "range":  [
                {
                    "fixed":  "69b53add90a9479d7960b822fc60601d659c328b"
                }
            ],
            "source":  "REFERENCES_COMMIT"
        }
    ]
}

Affected versions

2.*
2.7.0
2.7.1
2.7.2
2.7.5
2.7.6
v2.*
v2.7.0
v2.7.1
v2.7.2

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-1521.json"
vanir_signatures 
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        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/open5gs/open5gs/commit/69b53add90a9479d7960b822fc60601d659c328b",
        "target":  {
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            "function":  "sgwc_s5c_handle_create_session_response"
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        "digest":  {
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vanir_signatures_modified 
"2026-10-21T09:41:39Z"