Vulnerability in Open5gs
CVE-2026-4988
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
EPSS: 0.007 (52.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 53rd percentile — 52.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.007 · change: +0.002
Affected products
- Open5gs — versions 2.7.6
- Open5gs — versions 2.7.6
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (Exploit, VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/open5gs/open5gs/issues/4342 (issue-tracking, Exploit, Issue Tracking)
- github.com/open5gs/open5gs/issues/4342 (issue-tracking, exploit, Issue Tracking)
- github.com/open5gs/open5gs/ (Product, product)
Frequently asked questions
- What is CVE-2026-4988?
- CVE-2026-4988 is a low-severity vulnerability in Open5gs, classified under Improper Resource Shutdown or Release. CVSS score: 3.7/10. Published 2026-03-27.
- How severe is CVE-2026-4988?
- Low severity. CVSS v3 base score is 3.7 out of 10.