How severe is CVE-2026-4988?

CVE-2026-4988 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2026-4988 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-4988?

CVE-2026-4988 affects Open5gs. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-4988?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-4988 have an EU (EUVD) identifier?

Yes. CVE-2026-4988 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16895.

When was CVE-2026-4988 published?

CVE-2026-4988 was published on 2026-03-27 and last updated on 2026-06-17.

CVE-2026-4988

CVE-2026-4988 is a low-severity vulnerability in Open5gs with a CVSS 3.x base score of 3.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-404.

Key facts

Severity: Low (CVSS 3.x base score 3.7)
CVSS v2: 2.6
CVSS v4: 2.9
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-16895
Weakness: CWE-404
Affected product: Open5gs
Published: 2026-03-27
Last modified: 2026-06-17

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-4988?: CVE-2026-4988 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2026-4988 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-4988?: CVE-2026-4988 affects Open5gs. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-4988?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-4988 have an EU (EUVD) identifier?: Yes. CVE-2026-4988 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-16895.
When was CVE-2026-4988 published?: CVE-2026-4988 was published on 2026-03-27 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:open5gs:open5gs:2.7.6:*:*:*:*:*:*:*

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