CVE-2026-8290: Open5GS SMF nsmf-handler.c smf_nsmf_handle_update_data_in_vsmf denial of service

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-05-11 · updated 2026-06-17
Weakness: CWE-404

Description

A security flaw has been discovered in Open5GS up to 2.7.7. This issue affects the function smf_nsmf_handle_update_data_in_vsmf of the file /src/smf/nsmf-handler.c of the component SMF. The manipulation results in denial of service. The attack can be executed remotely. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

Open5GS: through 2.7.7

References

https://github.com/open5gs/open5gs/
https://github.com/open5gs/open5gs/issues/4454
https://vuldb.com/submit/808507
https://vuldb.com/vuln/362587
https://vuldb.com/vuln/362587/cti
https://vuldb.com/submit/808507

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