What is CVE-2026-7583?

CVE-2026-7583 is a medium-severity vulnerability in Open5gs, classified under Improper Resource Shutdown or Release. CVSS score: 4.3/10. Published 2026-05-01.

How severe is CVE-2026-7583?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Open5gs

CVE-2026-7583

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.

Published 2026-05-01 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.005 (38.5th percentile), scored 2026-10-04.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 38.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Open5gs — versions 2.7.0, 2.7.1, 2.7.2

Weakness classification (CWE)

CWE-404 — Improper Resource Shutdown or Release

References

vuldb.com/vuln/360530 (technical-description, vdb-entry)
vuldb.com/vuln/360530/cti (signature, permissions-required)
vuldb.com/submit/804322 (third-party-advisory)
github.com/open5gs/open5gs/issues/4401 (issue-tracking, exploit)
github.com/open5gs/open5gs/ (product)

Frequently asked questions

What is CVE-2026-7583?: CVE-2026-7583 is a medium-severity vulnerability in Open5gs, classified under Improper Resource Shutdown or Release. CVSS score: 4.3/10. Published 2026-05-01.
How severe is CVE-2026-7583?: Medium severity. CVSS v3 base score is 4.3 out of 10.