CVE-2026-7583: Open5GS BSF context.c bsf_sess_find_by_ipv6prefix denial of service

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-05-01 · updated 2026-06-17
Weakness: CWE-404

Description

A flaw has been found in Open5GS up to 2.7.7. This issue affects the function bsf_sess_find_by_ipv6prefix of the file /src/bsf/context.c of the component BSF. This manipulation of the argument ipv6Prefix causes denial of service. It is possible to initiate the attack remotely. The exploit has been published and may be used. The project was informed of the problem early through an issue report but has not responded yet.

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/issues/4401
https://vuldb.com/submit/804322
https://vuldb.com/vuln/360530
https://vuldb.com/vuln/360530/cti

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