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open5gs

A vulnerability has been found in Open5GS up to 2.7.6. The affected element is the function sgwc_s11_handle_modify_bearer_request of the file /sgwc/s11-handler.c of the component SGWC. The manipulation leads to denial of service. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. Applying a patch is the recommended action to fix this issue. The issue report is flagged as already-fixed.

Open5GS is an open-source implementation of the 5G core network, widely used for research, testing, and production in mobile network infrastructures. CVE-2026-1587 identifies a denial of service (DoS) vulnerability in the SGWC (Serving Gateway Control) component, specifically within the sgwc_s11_handle_modify_bearer_request function located in the /sgwc/s11-handler.c source file. This function handles Modify Bearer Request messages over the S11 interface, which is critical for bearer management in the 5G core network. The vulnerability arises from improper handling or validation of these requests, allowing a remote attacker to craft malicious packets that cause the SGWC process to crash or become unresponsive, leading to denial of service. The attack vector requires no authentication, user interaction, or privileges, and can be executed remotely over the network. The CVSS 4.0 base score is 6.9, reflecting a medium severity level due to the lack of confidentiality, integrity, or availability impact beyond service disruption. The vulnerability affects all Open5GS versions from 2.7.0 through 2.7.6. The issue has been publicly disclosed and fixed in subsequent releases, though no confirmed exploits have been detected in the wild. Given the critical role of SGWC in 5G core networks, this vulnerability could disrupt mobile network services if exploited.

Detailed information about CVE-2026-1587: Denial of Service in Open5GS affecting null Open5GS. Get real-time updates, technical details, and mitigation strategi

CVE-2026-1587: Denial of Service in Open5GS - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-1587: Denial of Service in Open5GS

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