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CVE-2026-4988

Open5GS CCA Message smf_s6b denial of service

CVSS 6.3 MEDIUMEPSS 0.6%CWE-404
A security flaw has been discovered in Open5GS 2.7.6. This issue affects the function smf_gx_cca_cb/smf_gy_cca_cb/smf_s6b of the component CCA Message Handler. The manipulation results in denial of service. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is assessed as difficult. The exploit has been released to the public and may be used for attacks.
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P
Affected products
n/a · Open5GS
public PoCs found — 1
cve_referencegithub.com/open5gs/open5gs/issues/4342#issue-4021772232unverified
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.

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References
https://github.com/open5gs/open5gs/https://github.com/open5gs/open5gs/issues/4342https://github.com/open5gs/open5gs/issues/4342#issue-4021772232https://vuldb.com/?ctiid.353875https://vuldb.com/?id.353875https://vuldb.com/?submit.771349