What’s Vulnerable › Vulnerabilities

CVE-2026-82589: Open5GS N1-N2 Message namf-handler.c amf_namf_comm_handle_n1_n2_message_transfer denial of service

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-30 · updated 2026-08-31
• Weakness: CWE-404

Description

A security flaw has been discovered in Open5GS up to 2.7.7. Impacted is the function amf_namf_comm_handle_n1_n2_message_transfer of the file src/amf/namf-handler.c of the component N1-N2 Message Handler. Performing a manipulation of the argument N1N2MessageTransferReqData.n2InfoContainer.smInfo.n2InfoContent.ngapIeType results in denial of service. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.8.0 is recommended to address this issue. The patch is named abf8a836564b966b5141110fc25ed413c4f17522. It is advisable to upgrade the affected component.

Affected products

• Open5GS: 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.7.5 (+2)

References

• https://github.com/open5gs/open5gs/
• https://github.com/open5gs/open5gs/commit/abf8a836564b966b5141110fc25ed413c4f17522
• https://github.com/open5gs/open5gs/issues/4396
• https://github.com/open5gs/open5gs/releases/tag/v2.8.0
• https://vuldb.com/cve/CVE-2026-82589
• https://vuldb.com/submit/891892
• https://vuldb.com/vuln/397084
• https://vuldb.com/vuln/397084/cti

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