CVE-2026-4240 | Open5GS up to 2.7.6 CCA denial of service (Issue 4343)

A vulnerability was found in Open5GS up to 2.7.6. It has been classified as problematic. The affected element is the function smf_gx_cca_cb/smf_gy_cca_cb/smf_s6b_aaa_cb/smf_s6b_sta_cb of the component CCA Handler. This manipulation causes denial of service.

This vulnerability is handled as CVE-2026-4240. The attack can be initiated remotely. Additionally, an exploit exists.

Upgrading the affected component is recommended.