CVE-2026-4988

Name: CVE-2026-4988
Creator: NVD / NIST
Published: 2026-03-27T22:16:23.533+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 2.9/10EPSS 0.57%

Last modified Jun 17, 2026

CVE-2026-4988 is a low-severity vulnerability rated 2.9/10 on the CVSS scale. 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. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS 4.0

2.9/10

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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.57%

42.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-404

Affected Software

Vendor	Product	Versions
Open5gs	Open5gs	2.7.6

References

https://github.com/open5gs/open5gs/Product
https://github.com/open5gs/open5gs/issues/4342Exploit, Issue Tracking
https://github.com/open5gs/open5gs/issues/4342#issue-4021772232Issue Tracking
https://vuldb.com/?ctiid.353875Permissions Required, VDB Entry
https://vuldb.com/?id.353875Third Party Advisory, VDB Entry
https://vuldb.com/?submit.771349Exploit, Third Party Advisory, VDB Entry

Timeline

Published: Mar 27, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-4988?

How severe is CVE-2026-4988?

CVE-2026-4988 has a CVSS score of 2.9/10 (LOW severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.

How do I fix CVE-2026-4988?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-4988?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST